One, Two, Multi: Party Systems Compared

Party system shape predicts governance style. Two party systems, the US, produce broad coalitions before elections and policy stability with abrupt swings.

Multiparty consensus systems, Netherlands, Germany, Scandinavia, negotiate coalitions after elections, rewarding compromise and proportional voices. Dominant party systems, Japan for decades, Mexico under the PRI, mix stability with entrenchment risks.

Duverger law explains much: winner take all districts collapse parties toward two, proportional representation sustains many. Each shape prices differently: two party systems mute minorities, multiparty ones can freeze into permanent bargaining, and hybrid systems borrow troubles from both..