How much of American success over the last 70-80 years has less to do with American culture, principles, and ingenuity and more to do with it winning WWII with the least decimation and then being able to set the rules of the global order?

Chasing Curiosity. Empathetic Accelerationist. Founding Fullstack Engineer @icebreaker. YC S16, KB7. 
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American success is a blend of post-WWII positioning and inherent cultural and innovative vitality. Both historical events and national spirit have shaped its global role and accomplishments.