AP European History study materials
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The Diet of Worms and the Princes' Calculus

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The Diet of Worms and the Princes' Calculus

It is 1521. Martin Luther has refused to recant before Charles V at the Diet of Worms, and the Edict of Worms has declared him an outlaw. Charles V, however, is distracted: he must defend against Ottoman advances in Hungary and face Francis I of France in Italy. A German prince, Frederick of a small Saxon territory, must decide whether to shelter Luther. Frederick's territory yields 40,000 guilders annually. Sheltering Luther risks imperial censure, which could cost him his electoral privilege (worth roughly 25,000 guilders a year in tolls and exemptions). If he does not shelter Luther, he keeps the privilege but forfeits the goodwill of neighboring princes who sympathize with reform and who control a trade route worth 15,000 guilders a year to him. Charles V's attention is stretched thin.

1. Assess Frederick's decision using the political and economic variables given. What makes this a judgment call rather than a simple matter of religious conviction?

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This is a risk-weighted political calculation layered on conviction, not a pure either/or.

Quantify the stakes:

  • Shelter: risk losing 25,000 guilders/year in privilege if Charles can enforce the Edict. But Charles is fighting on two fronts (Ottoman Hungary, France in Italy), so the probability of enforcement against a prince is low in the near term.
  • Refuse: certain loss of 15,000 guilders/year in sympathetic-prince trade, plus reputational cost among reform-minded neighbors.

Expected-value sketch: if enforcement probability is, say, 0.3, sheltering costs 0.3 × 25,000 = 7,500 expected versus a certain 15,000 forgone by refusing. Shelter wins unless Frederick believes Charles will soon be free to punish him.

The judgment: Frederick's conviction aligns with his interest, which is why the case is hard to read. The exam wants you to see that the Reformation spread partly because political fragmentation made imperial enforcement costly - princes could shelter reformers at low expected cost. Religious sincerity and self-interest are not mutually exclusive; here they reinforce each other.

2. A student argues that Frederick's choice proves the Reformation succeeded because princes were cynical opportunists. Evaluate this claim using the setup.

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The claim overreaches. The setup shows alignment, not proof of cynicism.

  • The variables (tolls, trade routes, enforcement probability) show sheltering was affordable and advantageous - a necessary condition for reform to survive.
  • They do not show Frederick's motive was opportunism. A prince who sheltered Luther from conviction would make the same choice; the numbers cannot distinguish motive from circumstance.

What the evidence does support: structural conditions (imperial distraction, territorial fragmentation, princely autonomy) lowered the cost of protecting reformers. That is a claim about feasibility, not about sincerity.

The disciplined answer: the Reformation's survival required both conviction and the political space to act on it. The setup establishes the space; it is silent on the heart. Conflating "it was in his interest" with "he acted only from interest" is the inference to resist.