We use essential storage to run PoliticaHub. Under EU and Swedish rules, analytics and advertising stay off unless you actively allow them. Advertising consent is also required before any personalized Google ads can load. Privacy Policy.
Free weekly digest built from election calendars, officeholder changes, and the strongest pages in PoliticaHub.
Structured weekly digest. No more than one email per week. Manage topics or unsubscribe after confirmation.
In proportional democracies, no party ever wins outright. Government is always a negotiation. Select parties, count seats, and discover why some coalitions hold — and others collapse before they start.
How the viability score works
Seat majority (30 pts)
Does the coalition command a working majority? How large is the buffer above the threshold?
Ideological cohesion (30 pts)
How wide is the ideological distance between parties? Broader coalitions face higher policy compromise costs.
Historical precedent (20 pts)
Have these parties governed together before? Prior experience builds institutional trust and reduces negotiation friction.
Political compatibility (20 pts)
Have any parties explicitly ruled each other out? Declared incompatibilities are the hardest barrier to overcome.
Riksdag · 2022 · 349 seats
No party has ever won a Riksdag majority. The Sweden Democrats broke the traditional two-bloc system.
Majority
175
Parties
8
Scenarios
4
Bundestag · 2025 · 630 seats
The AfD's rise as the second-largest party broke Germany's post-war firewall — forcing a CDU/CSU + SPD Grand Coalition despite deep mutual reservations.
Majority
316
Parties
6
Scenarios
4
Tweede Kamer (House of Representatives) · 2023 · 150 seats
Geert Wilders' shock victory turned the most fragmented parliament in Dutch history into a right-wing government — formed after 167 days of negotiations.
Majority
76
Parties
11
Scenarios
4
Knesset · 2022 · 120 seats
No party has ever won a Knesset majority. Israel held four elections in three years (2019–21) before Netanyahu's fifth government — its most right-wing in history — finally held.
Majority
61
Parties
11
Scenarios
4
Why coalition politics matters
Most of the world's democracies use proportional representation, which almost always produces multi-party legislatures where no single party commands a majority. Coalitions are how democratic societies resolve political pluralism into governing majorities — but the compromises required often determine what policies actually get implemented. Understanding which parties can and cannot govern together reveals how ideology, history, and electoral math shape real-world outcomes.