Why did people leave their doors unlocked in the 1950s?

Surely this wasn't as safe as they thought it was, because there was crime then as well. I once saw a movie set in the 50s where a woman left her door unlocked and someone walked into her home and attacked her. They had nothing worth stealing back then, but there was still crime even then. Why did people leave... show more Surely this wasn't as safe as they thought it was, because there was crime then as well. I once saw a movie set in the 50s where a woman left her door unlocked and someone walked into her home and attacked her. They had nothing worth stealing back then, but there was still crime even then. Why did people leave their doors unlocked in the 1950s?
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