When was America great?

So we all know Trump’s slogan, Make American Great Again. So “again” means that before Trump was in office, there was a time America was great. This isn’t about criticizing Trump. But my genuine question is… when was America great? There were always times when America succeeded in one particular area, yet failed horribly in others. This is just natural. But was there ever a time where America was the golden standard in absolutely everything? (Freedom, equality, crime rates, economy, low poverty and unemployment, etc)

When was America great?
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