Electoral systems shape the character of democratic representation. Among them, majoritarian methods—where the candidate with the most votes wins a single seat—are the most widespread worldwide, used in countries such as the United Kingdom, the United States, India, Canada, and many others. Yet these systems have a far from neutral effect on who gets elected. Decades of political science research demonstrate that majoritarian systems systematically disadvantage women and ethnic, racial, and religious minorities in parliamentary bodies. Understanding this relationship is not merely academic; it has real consequences for policy outcomes, social trust, and the legitimacy of democratic institutions. This article examines how majoritarian electoral rules affect the representation of women and minorities, reviews the empirical evidence, and considers reforms that can make parliaments more inclusive.

What Are Majoritarian Electoral Systems?

Majoritarian electoral systems are those in which a single winner is elected per constituency based solely on receiving the most votes. The most common variant is first-past-the-post (FPTP), used in over 40 countries. Other majoritarian systems include the two-round system (used in France for legislative elections) and the alternative vote (used in Australia for the House of Representatives). In all cases, the candidate who crosses the winning threshold—whether a simple plurality or an absolute majority—secures the seat. This contrasts sharply with proportional representation (PR) systems, which allocate seats in multi-member districts in proportion to each party’s vote share.

The key structural feature of majoritarian systems is the single-member district. Because only one person wins, these systems create high-stakes competition for a limited number of seats. Political parties must carefully select candidates who they believe can appeal to a broad cross-section of voters in that district. This “winner-take-all” logic often rewards candidates from dominant demographic groups—historically, men from the ethnic or religious majority—who are perceived as safer bets. The cost of losing a seat is high, so parties tend to avoid perceived risks. This inbuilt conservatism in candidate selection directly constrains opportunities for women and minorities to run for and win parliamentary office.

The Mechanisms Linking Electoral Systems and Representation

Candidate Selection and Gatekeeping

In majoritarian systems, parties function as gatekeepers. They control who appears on the ballot, and their selection decisions are shaped by electoral incentives. Studies of candidate selection in FPTP countries show that parties often prioritize incumbents—overwhelmingly white and male—and choose challengers who fit the demographic profile of past winners. This “incumbency advantage” perpetuates existing imbalances. Furthermore, because each constituency elects only one member, parties cannot use a balanced ticket to ensure diversity. In a proportional multi-member district, a party can nominate a diverse slate and expect that multiple candidates will be elected; in a single-member district, only one candidate can win, so ethnic or gender diversity often becomes secondary.

Strategic Voting and Wasted Votes

Majoritarian systems also discourage voters from supporting minority candidates or smaller parties that represent minority interests. Voters who prefer a candidate from an underrepresented group may fear that their vote will be “wasted” if that candidate has little chance of winning. This psychological effect, known as strategic (or tactical) voting, depresses vote shares for candidates outside the mainstream and reinforces the dominance of the two largest parties. Consequently, even when minority candidates do run, they face an uphill battle to convince voters to support them. Research by Cox (2020) shows that strategic voting is more prevalent in FPTP systems than in PR systems, directly penalizing diversity.

Impact on Women’s Representation

Empirical Evidence: A Global Picture

Cross-national data compiled by the Inter-Parliamentary Union consistently shows that countries using proportional systems have higher percentages of women in parliament than those using majoritarian systems. As of 2023, the global average for women in single or lower houses is 26.5%. In countries using PR, the average exceeds 30%; in pure FPTP systems, it falls below 20%. For example, Rwanda (with a mixed system and strong quotas) has over 60% women, while the United Kingdom (FPTP) has about 35%, and the United States (FPTP) has 28.7% in the House of Representatives. These gaps are not accidental. Majoritarian systems create structural barriers that systematically reduce the number of women elected.

Structural Barriers for Women

Several specific mechanisms explain this underrepresentation. First, single-member districts favor incumbents, and women are less likely to be incumbents because they have historically been excluded from politics. Second, party gatekeeping is more restrictive: local party officials in FPTP systems often hold strong prejudices about the electability of women, particularly in conservative strongholds. Third, campaign costs are high for a single-winner race, and women often have less access to fundraising networks and party resources. Fourth, media coverage in majoritarian elections tends to focus on the “horse race” between frontrunners, making it harder for female candidates to gain visibility unless they are already well-known. A study by Thames and Williams (2013) demonstrates that when controlling for socioeconomic development and culture, electoral system type alone accounts for a significant proportion of the variation in women’s parliamentary representation.

Party Nomination Practices

Even within majoritarian systems, some parties perform better than others at nominating women. Parties with strong central control over nominations, like many social democratic parties, can impose gender quotas at the national level for candidate lists. However, in FPTP systems with highly decentralized candidate selection (such as the US or Canada), local constituencies often resist quotas. In the UK, the Labour Party’s all-women shortlists have increased women MPs from around 10% in the 1980s to over 50% of Labour MPs in the 2024 Parliament. Yet this success is uneven across parties; the Conservative Party, which never adopted such quotas, has a much lower share of women MPs. This highlights that party strategies can mitigate the disadvantages of majoritarian systems, but only when there is strong political will.

The Role of Political Culture and Social Norms

Electoral systems do not operate in a vacuum. Cultural attitudes toward women in leadership interact with electoral rules. In societies with deeply entrenched gender biases, majoritarian systems amplify those biases because voters and party selectors are more likely to question women’s competence. By contrast, in PR systems, parties can more easily “balance” a list by including women without risking losing a seat to a competitor. Moreover, the visibility of women in parliament itself changes social norms; majoritarian systems, by producing fewer women initially, slow the virtuous cycle of role modeling and normalization.

Impact on Minority Representation

Descriptive vs. Substantive Representation

Representation of ethnic, racial, and religious minorities is often measured in two ways: descriptive (whether parliament looks like the population) and substantive (whether minority interests are advanced). Majoritarian systems tend to underperform on both counts. Because minorities are often geographically dispersed, they may lack the concentration needed to elect a candidate in a single-member district. Even when they are concentrated, the majority group may still control the district unless district boundaries are deliberately drawn to create minority-majority seats—a practice that itself can be controversial.

Geographic Concentration and District Magnitude

The most direct link between majoritarian systems and minority underrepresentation is the effect of district magnitude—the number of seats per district. In majoritarian systems, each district elects a single member. For a minority group to win that seat, they must constitute a majority (or near-majority) of voters. That requires geographic clustering. By contrast, in PR systems with multi-member districts, a minority group representing 20–30% of the electorate can often secure a seat as long as it votes cohesively and parties include minority candidates on their lists. Research by Bird, Saalfeld, and Wüst (2011) shows that minorities in PR systems achieve descriptive representation at rates two to three times higher than in FPTP systems, even after controlling for population share.

Examples of Minority Underrepresentation

In the United States, African Americans and Hispanic Americans are historically underrepresented in Congress relative to their population share, despite the creation of majority-minority districts under the Voting Rights Act. These districts help but are often challenged legally, and they can concentrate minority voters in a way that reduces their influence in surrounding districts. In the United Kingdom, ethnic minority MPs reached a record 10% in 2024, but this is still below the 18% of the population that identifies as ethnic minority. Moreover, most ethnic minority MPs come from the Labour Party; the Conservative Party has far fewer. In India, despite a system of reserved seats for Scheduled Castes and Scheduled Tribes, other minority groups such as Muslims are severely underrepresented in Lok Sabha, holding about 4.6% of seats while constituting 14.2% of the population. The FPTP system, combined with geographically dispersed Muslim populations, makes it difficult for Muslim candidates to win unless they run in the few areas with high concentrations.

Barriers to Minority Candidacy

Structural barriers for minorities mirror those for women: gatekeeping by local party elites, who may hold prejudices or simply prefer candidates from the dominant group; limited access to campaign finance; and voter biases that lead some voters to cross the racial line only in low-information elections. Additionally, minorities often face the “electability myth”—the belief that a candidate from a minority group cannot win a district where the majority is not from that group, even when evidence suggests otherwise. This myth is particularly strong in majoritarian systems because losing a single seat is catastrophic, whereas in PR systems a minority candidate can be placed on a list without risking the party’s overall seat count.

Comparative Analysis: Majoritarian vs. Proportional Systems

A growing body of empirical work compares the representational outcomes of different electoral systems using controlled statistical models. One consistent finding is that the effect of electoral system type on women’s representation is larger than the effect of many other variables, such as economic development, religion, or region. For minorities, the effect is equally robust. In a meta-analysis of 20 studies, Fortin-Rittberger and Rittberger (2014) found that PR systems increase minority representation by an average of 5–10 percentage points compared to FPTP systems. Importantly, the gap persists even when controlling for the presence of affirmative action policies.

Proportional systems also facilitate the election of women and minorities from smaller parties, which often have more diverse candidate pools. In majoritarian systems, smaller parties are squeezed because voters desert them for fear of wasting votes. The result is a two-party duopoly in which the dominant parties tend to be less diverse—partly due to the self-reinforcing nature of incumbency and partly due to the need to appeal to a broad, often culturally conservative, median voter. Thus, the majoritarian system can entrench a homogeneity that is difficult to break without fundamental electoral reform.

Reforms to Improve Representation

Recognizing the deficiencies of majoritarian systems, many countries have introduced reforms. These can be grouped into three categories: electoral system changes, candidate quotas, and internal party reforms.

Electoral System Changes

The most direct reform is to move away from pure majoritarianism toward a mixed-member proportional (MMP) or a fully proportional system. Mixed systems, used in Germany, New Zealand, and Scotland (for regional elections), combine single-member districts with a compensatory list to ensure proportionality. Studies show that introducing MMP increases women’s representation by 5–10 percentage points and improves minority representation when list seats are used to bring diversity. New Zealand’s switch from FPTP to MMP in 1993 led to a dramatic increase in women MPs from 21% in 1993 to 29% in 1996, and to 50% by 2020. Similarly, in the United Kingdom, the adoption of the Additional Member System for the Scottish Parliament and Welsh Senedd has resulted in over 50% women representation in those bodies, far exceeding Westminster.

Quotas and Reserved Seats

Even within a majoritarian framework, quotas can be effective. Gender quotas—either legislated candidate quotas or voluntary party quotas—mandate that a certain percentage of candidates be female. In FPTP systems, such quotas are harder to implement because parties cannot simply place women at the top of a list; they must ensure that enough women are selected in winnable districts. However, the UK Labour Party’s all-women shortlists have proven successful. For minorities, reserved seats (as used in India for Scheduled Castes and Scheduled Tribes, and in Pakistan for women and non-Muslims) directly guarantee representation. The downside is that reserved seats can congeal ethnic identities and create tensions, but when carefully designed, they can boost descriptive representation significantly.

Redistricting and Delimitation

In many majoritarian systems, the drawing of district boundaries has a profound effect on minority representation. Gerrymandering—manipulating boundaries to dilute minority voting power—has been used for centuries. The US Voting Rights Act requires jurisdictions to create majority-minority districts where possible to prevent vote dilution, leading to increased representation of African Americans and Hispanics. However, this approach has critics who argue it segregates minority voters and reduces their influence in surrounding districts. An alternative is to use nonpartisan redistricting commissions and to require that districts be drawn to respect communities of interest. In the UK, the Boundary Commissions aim for neutral redistricting, but they do not consider race or ethnicity in their recommendations, which can perpetuate underrepresentation if minority populations are spread thinly.

Internal Party Democracy

Finally, parties themselves can adopt internal reforms to increase diversity in majoritarian systems. These include centralized candidate selection processes that enforce diversity targets, mandatory diversity training for selection committees, and funding support for women and minority candidates. The Australian Labor Party, for example, uses a centralized nomination system with a quota for women in winnable seats, leading to relatively high female representation in the House of Representatives despite the use of compulsory preferential voting (a majoritarian system). The International IDEA Gender Quotas Database tracks which parties use such measures and their effectiveness.

Conclusion

Majoritarian electoral systems are not neutral arbiters of democratic will; they systematically shape who gets elected and who remains excluded. The evidence is clear that first-past-the-post and similar winner-take-all methods produce parliaments that are less representative of women and minorities than proportional or mixed systems do. The mechanisms include candidate selection gatekeeping, strategic voting by the electorate, incumbency advantage, and the geographic constraints of single-member districts. While reforms such as quotas, redistricting, and internal party changes can mitigate some of these effects, the most reliable route to inclusive representation is electoral system change toward proportionality. Policymakers committed to democratic diversity should therefore examine the electoral rules under which they operate. As citizens, understanding these links empowers us to advocate for a system that truly represents the full richness of our societies.