The Masstricht Treaty is very long because it is very complicated and contains hundreds and hundreds of little compromises and exceptions to rules.
Some treaties, like the [Japanese Instrument of Surrender](https://upload.wikimedia.org/wikipedia/commons/f/f8/Instrument_of_surrender_Japan2.jpg) that ended WW2 are *very* short.
Turns out when one party has all the leverage a document can be quit brief.
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