Being from the pre Baby Boomer Silent (who knew) Generation there have been many big changes over my lifetime.

For instance: 
1) Computers, the Internet-social media
2) No Smoking in restaurants, etc.
3) Legalized Abortion
4) integration (Obama)
5) Gay rights
6) World wide economy (foreign cars)
7) Beatles-Stones
8) Global warming (flooding)
9) Cable TV
10) Sushi
11) Walmart, Home Depot
12) Renewed racial unrest-gun violence

And then there are zip and bar codes, cell phones, GPS, the Designated Hitter and what else?