And _because_ we care about the beautiful moral ideal, we tend to assume that psychological group differences don't exist or are superficial or are socially-constructed and will naturally dissipate after the revolution.
-invidious distinction
-
(... the scintillating but ultimately untrue thought.)
But this is _so crazy_ on _multiple levels_. Philosophers since the days of D. Hume have recognized the distinction between _is_ and _ought_: