For example, Trek showed white men, Asians, women, and even black women working together like it wasn't a thing at all. This may look a bit like your office today, but it was flat out Science Fiction in in 1966.
To illustrate this, here's what the US election map looked like in 1968, while Trek was running:
Those brown states? Those were won by a candidate running of a platform of "Segregation Forever".
So the society we have today, that looks so much like the bridge of the Enterprise? It didn't have to be that way. Lots of people didn't want it to be.
What happened was that a generation of people looked at what existed, looked at what Trek showed, and they chose Trek.
And believe me, this was appreciated at the time. There's a story that when Nichelle Nichols met with MLK, and casually mentioned she was considering leaving the show, he wouldn't let her.
> I said something like, Dr. King, I wish I could be out there marching with you. He said, no, no, no. No, you don't understand. We don't need you on the - to march. You are marching. You are reflecting what we are fighting for. So, I said to him, thank you so much. And I'm going to miss my co-stars.