Senethro
Overlord
As for universalist leftists, I know who they were in my own country. They achieved a lot back in the 1970s: universal health care and a massive reduction in epidemics and childhood mortality, social security, good labour laws, public ownership of the natural monopolies and of finance, eradication of slums, etc. They achieved this for everyone. And much of this has been rolled back in recent years... I have my reasons to often be angry at contemporary politics.
Post-war they did the same in the UK and similarly there has been a reversal more recently.
Universalist leftism would be optimal imo, save for the fact that it lost its fight and doesn't know how to win again, so it is far from optimal. I don't have a solution or answers, just questions and bitterness.
At least the "identity politics" leftists are making some progress on their issues!