Capstone

German Political History II: Division, Reunification & the Federal Republic

Chapter 10 · Capstone: Tracing a Real Modern German Coalition Formation

This course has traced how modern German government came to work — from a divided vacuum in 1945, through a constitution deliberately engineered against Weimar's own failures, through the Wall, the Peaceful Revolution, and reunification's own real, costly mechanics, to the fragmented, contested party system of today. This capstone closes the course by tracing one real, current example — the CDU/CSU-SPD coalition that took office in 2025 — through every stage of its own real formation, applying the tools this course has built along the way.

Stage 1 — The Arithmetic of a Coalition

Chapter 8 already established the raw 2025 election numbers: CDU/CSU 208 seats, AfD 152, SPD 120, Greens 85, Die Linke 64, out of 630 total. A working government needs an absolute majority — 316 seats. No single party came close on its own; CDU/CSU and SPD together reached 328, a real, workable twelve-seat cushion above the threshold Chapter 8's own coverage of Merz's tight chancellor vote later showed mattered in practice.

Stage 2 — Why Not Another Combination? The Brandmauer

CDU/CSU and AfD together would have reached 360 seats, comfortably past the threshold with no SPD needed at all — arithmetically simpler than the coalition actually formed. It was never seriously on the table. Since 2013, Germany's mainstream parties have maintained an informal but real practice known as the Brandmauer — the firewall — refusing to form coalitions with the AfD at any level of government.

That norm was tested directly just weeks before the coalition talks began: in late January 2025, the CDU put forward a non-binding Bundestag motion on border detention that passed using AfD votes — the first time since 1945 the cordon sanitaire had been broken in the Bundestag at all. Real protests followed at genuinely large scale: an estimated 160,000–250,000 people in Berlin alone on 2 February, with over 220,000 more across other major cities the day before.

Finding: an informal defense standing alongside Chapter 9's formal one Chapter 9 covered Article 21(2) — the Basic Law's real, formal legal tool for banning a party judged to be genuinely anti-democratic. The Brandmauer is something different: not a law at all, but a real, voluntarily maintained political norm among mainstream parties, doing similar defensive work through simple refusal to cooperate rather than through any court. The February 2025 breach, and the scale of public reaction it produced, shows this informal defense is taken just as seriously in practice as the formal one Chapter 9 traced back to Karl Loewenstein — and that CDU/CSU chose to restore it for the coalition itself, even after briefly breaking it weeks earlier.
Stage 3 — From Exploratory Talks to a Signed Agreement

Formal exploratory talks (Sondierungsgespräche) between CDU/CSU and SPD began 28 February 2025 — just five days after the election itself. A full coalition agreement (Koalitionsvertrag) was reached 9 April 2025, and formally signed by both parties' own leaders on 5 May 2025.

Finding: the same real preference for speed traced back through this whole course Chapter 7 showed West and East Germany's own leaders choosing Article 23's fast accession route over Article 146's slower, more deliberate one, given East Germany's real 1990 economic collapse. The 2025 coalition talks followed a comparable real logic on a smaller scale — exploratory talks beginning within days, a full agreement inside six weeks — a genuine, recurring preference in German political history for moving quickly once a workable majority is identified, rather than prolonging negotiation for its own sake.
Stage 4 — The Bundestag Vote

Chapter 8 already covered this stage in full: on 6 May 2025, Merz fell six votes short of the 316 needed on the Bundestag's first ballot — the first such shortfall in postwar German history — before winning a second vote the same day with 325 votes.

Stage 5 — Dividing the Government

The finished coalition agreement allocated 10 ministries to CDU/CSU (7 CDU, 3 CSU) — including the Chancellery, Foreign Affairs, and Economic Affairs — and 7 to the SPD, including Defence, Labour and Social Affairs, and the Vice Chancellorship itself.

What Each Stage Actually Drew On

Capstone stageBuilt directly on
Stage 1 — Coalition arithmeticChapter 8 (the 2025 election results and the 316-seat threshold)
Stage 2 — The BrandmauerChapter 9 (Article 21(2) and Germany's own formal defensive-democracy tools)
Stage 3 — Talks to agreementChapter 7 (Article 23's own real preference for speed over prolonged deliberation)
Stage 4 — The chancellor voteChapter 2 & Chapter 8 (the constructive vote of no confidence and Merz's real, unprecedented second-round election)
Stage 5 — Dividing governmentChapter 3 (West Germany's own real coalition-government structure, first established in 1949)
Course Complete — and the Full German Political History Project This closes German Political History II, and with it the full two-course German Political History project — from the German Empire's own unification in 1871 (German Political History I) through to a real, working coalition government formed in 2025. Together with Political Theory Fundamentals, UK Politics Fundamentals, and US Politics Fundamentals, the Politics Subject now holds 50 chapters across five complete courses.

Quick Reference

  • 23 February 2025: election gives CDU/CSU 208 seats, AfD 152, SPD 120 — no single-party majority
  • CDU/CSU + SPD = 328 seats, a workable majority; CDU/CSU + AfD (360) was never seriously considered, given the real Brandmauer norm
  • Late January 2025: a CDU-led Bundestag motion passes using AfD votes — the first cordon sanitaire breach since 1945 — triggering real protests of 160,000–250,000+ people
  • 28 February–5 May 2025: exploratory talks, a full coalition agreement (9 April), and its formal signing
  • 6 May 2025: Merz elected Chancellor on a second Bundestag ballot, after falling short on the first
  • Final cabinet split: 10 CDU/CSU ministries, 7 SPD ministries, SPD holding the Vice Chancellorship