Comment by debo_

Other Western or global societal norms that started in America:

- female body hair removal[0]

- diamond engagement rings[1]

- to-go beverages in disposable paper cups[2]

[0] https://en.wikipedia.org/wiki/History_of_removal_of_leg_and_...

[1] https://en.wikipedia.org/wiki/Engagement_ring

[2] https://en.wikipedia.org/wiki/Paper_cup