I think the Star Trek ideal is not viable in the least as people will always be self centered. They will either seek either to make there own lives better or to make there families lives better. Also Star Trek changes its narrative depending on the movie or series.
I don’t think humans would be naturally self centered if they lived in an environment that actually encouraged sharing and cooperation instead of actively encouraging and rewarding psychopathy and selfishness.
There were likely people who thought it impossible that wolves would someday become domesticated, and eventually be our best buds, due to their ‘unchangeable’ nature.
We are all products of our environment.
Wolves are pack animals, and treat other members of their pack as equals. It’s really not that surprising that an offshoot of their species was domesticated.
Also, dogs are actually kinda unique in how changeable they are. I don’t know of any other species with such drastic variations in size, coloring, and behavior.
Humans are also inherently cooperative for survival, and it has been argued by some credible historians that our current forms of antagonistic society is an abberation from the norm.
Catalonia during the Spanish revolution is a pretty solid example. It showed no signs not working until they were forced to stop due to Franco winning the war. Wikipedia entry for more info.
