It's not like those things went away as soon as the 21st century rolled around. Women can still vote and having different skin color is not an automatic no-go on citizenship.
But I thought the issue here was the amount of
change, no? So the 21st century has quite a ways to go to match the 20th.
You also have to remember that WRT sexual orientation, most of the heavy lifting was actually done in the 20th century. Up to the 1950s, in a lot of places being homosexual could lose you a job, child custody, even get you arrested. By the end of 1999, it was pretty much socially & legally acceptable.