A similar trend is visible in India too. Headgear(type varying by the region) was quiet an essential part of the dressing. There are parts where a lot of men st

A similar trend is visible in India too. Headgear(type varying by the region) was quiet an essential part of the dressing. There are parts where a lot of men still wear headgear (rural Maharashtra for example). But it is gone from majority of population. Given that we neither had a switch to private vehicles in 50s nor JFK, there has to be a more globally applicable explanation for this!