Why did men have long hair in the 1970s, that became shorter later

Were police officers allowed to wear long hair in the 70's? - Quora

Are long haired men a common thing in your country? And how is it socially accepted? - Quora

In the 1970s, we were returning back to men having long hair again from the George Washington era. Why didn't it catch on? - Quora

Were men allowed to have long hair in 1970s China? - Quora

Why did men start keeping their hair short in the modern age? - Quora

Why do many men stop wearing long hair after college? - Quora

Why do many men stop wearing long hair after college? - Quora

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Why do many men stop wearing long hair after college? - Quora