How many generations will it take to remake the culture of an entire country?

Overt bigotry against black people finally became socially unacceptable only after we passed strong federal laws making discrimination illegal. I don't know which caused which, but I think it would be interesting to find out what would happen to our culture if most guns were illegal and the "official" word on the subject was that gun ownership without proved need was unacceptable. Thirty years from now, it would be nice if elder politicians with youthful ties to the NRA, in order to keep their seats, had to repeatedly apologize for it and explain how their eyes were finally opened to how they were supporting gun violence. Or that overtly violent movies and games would meet the same response that games about being a slave owner or about cleaning out the ghettos would meet today. The same comparisons can be made about the role of women in our society, and which behaviors and words are acceptable and which are not.

Changing the general view of society is possible, and strong federal laws could help with that.