Consociational democracy is a power-sharing model designed to stabilize deeply divided societies. Lijphart identified four essential features: a grand coalition of all significant segments (executive power-sharing), mutual veto to protect minority interests, proportionality in representation and public sector employment, and segmental autonomy for communities to manage their own affairs (e.g., education, culture). This model transforms elections from zero-sum contests into inclusive negotiations, preventing majority tyranny and encouraging cross-community cooperation.

Lijphart distinguishes two ideal types: majoritarian (Westminster) democracy, which concentrates power in a single-party majority cabinet, uses plurality elections, and favors centralization; and consensus democracy, which disperses power through multiparty coalitions, proportional representation, federalism, and bicameralism. He quantified these differences across 36 democracies in *Patterns of Democracy* (1999), showing that consensus democracies outperform majoritarian ones on measures of representation, women's representation, and environmental protection, while maintaining comparable economic performance.

While Duverger focused on the mechanical effects of electoral rules on party numbers and Sartori emphasized party system typologies, Lijphart's primary concern is the *systemic outcome* for conflict management and inclusion. He argues that proportional representation is superior not just for proportionality but because it encourages coalition-building, reduces wasted votes, and gives voice to minorities—making it the preferred choice for divided societies. His framework explicitly links electoral system choice to the broader institutional architecture of power-sharing, bridging electoral studies and comparative constitutional design.

In *Patterns of Democracy* and subsequent research, Lijphart marshals cross-national data showing consensus democracies have higher women's legislative representation, lower incarceration rates, better environmental policies, and more effective poverty reduction than majoritarian systems, without sacrificing economic growth or political stability. He also finds that consensus democracies are more 'kinder, gentler' in policy outcomes. Critics note these correlations may be confounded by historical or cultural factors, but Lijphart's extensive dataset remains a powerful empirical rebuttal to the claim that majoritarian systems are inherently more efficient or accountable.

Lijphart's consociational model directly influenced the 1998 Good Friday Agreement in Northern Ireland, the South African transition in the 1990s, and the Dayton Accords for Bosnia and Herzegovina. In each case, negotiators adopted elements of grand coalition, mutual veto, and proportionality to address deep ethno-national divisions. More recently, power-sharing arrangements in Lebanon, Iraq, and Kenya reflect his principles. While implementation has been mixed—Bosnia remains fragmented—his framework remains the primary reference for international mediators designing post-conflict constitutions.

Critics argue consociationalism can freeze ethnic identities, entrench elites, and hinder the development of cross-cutting cleavages. It may also produce gridlock or immobilism when vetoes are overused. Some scholars, like Donald Horowitz, advocate centripetal alternatives that incentivize moderation through preferential voting rather than power-sharing. Lijphart has responded that consociationalism is not a panacea but a pragmatic response to conditions of deep pluralism, and that its success depends on elite commitment and supportive international context. He acknowledges that in some cases, integrationist approaches may be viable but maintains that power-sharing remains the best option for severely divided states.

Many assume Lijphart advocates PR universally, but he explicitly distinguishes between PR in homogeneous societies and PR in divided ones. In *Patterns of Democracy*, he shows that the benefits of PR—especially for representation of minorities—are stronger in plural societies. For homogeneous countries, he acknowledges plurality systems may work adequately. Moreover, he does not endorse any specific PR formula (e.g., list vs. STV) but rather the principle of proportionality as a general institutional orientation. His position is nuanced: PR is a tool for inclusion, not an end in itself.