Europe has more Russian lessons to learn

LONDON, June 26 (Reuters Breakingviews) – A failed mutiny against Russian President Vladimir Putin rams home the European Union's need to protect itself from trouble abroad. Leaders meeting this week in Brussels are already thinking in more geostrategic terms. But until they act as a bloc they will lack clout. The short-lived uprising by mercenaries led by Yevgeny Prigozhin has weakened Putin, and could help Ukraine in its ongoing counteroffensive against Russia. However, it has also raised the prospect of more chaos, unpredictability and danger on the EU's frontiers. The EU is already suffering for its past failure to take…