The United States entered World War II because Japan bombed Pearl Harbor, Hawaii.
Answer:
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I would say that good judgement comes from considering the outcomes of your decisions.
This is not something that is a "talent": something that one is born with, or something that can be done without thinking too hard. Instead, one actually has to consider the outcomes of the decisions to be able to evaluate them.
It effectively created the bicameral (two-house) legislature that we have today, with the House of Representatives proportional to state population, and the Senate, which has two people from each state.