1966 was a time of rebellion in America: The Civil Rights movement, the anti-Vietnam war movement, the Free Love movement, were all on the rise. People were pissed — at the government, at the establishment, at each other, and at the ‘other.’
Along came a TV show called Star Trek (now referred to as The Original Series, or just ToS). In the show, we had gotten past our differences, we had gotten past greed, we’d molded the establishment. We were out to make the known world a better place for everyone, and we were actively seeking out new members. It was a very positive, stabilizing message.
Fast forward to today.
(Spoilers for Star Trek: Discovery episodes 1&2; The Orville episodes 1-3)