One of the most famous sci-fi setting of the 70-s and 80-s was the Noon Universe by the Strugastky brothers
https://en.wikipedia.org/wiki/Noon_Universe
A superficially utopian universe with technologically advanced humans, who actively practice "progressorship", in other words enlightenment of other civilisations. And the ending is not quite as utopian.
With "Xeno enlightenment" being one of the options in the screenshot in this DD, I was wondering just how it will work and whether there are different outcomes possible when trying this.