If you're referring to the militarization and aggression of Germany, there's a lot of debate as to why these nations didn't intervene earlier. The general consensus is that nobody believed Germany would take it as far as they did.
Was in charged of dealing with difficult issues connected to the church's power
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The correct answer is observational
Observation is a constant source of knowledge for man about himself, others and the world around him. The observational method is one of the most used in the social sciences and has some curious aspects.