Robert Conquest's Second Law states that:
Any organization not explicitly right-wing sooner or later becomes left-wing.
This is now refuted.
Charlton's Second Law therefore states that:
Any organization, ideology or social movement will sooner or later be corrupted by sex; unless an explicit (and strongly-enforced) sexual regulatory system is built-into it from the ground-up.
My modification is more fundamental than Conquest's Second Law; because it includes modern left-wing organizations, ideologies and social movements - which have all and without exception been corrupted away from their original political, economic and egalitarian purposes by the emergent sexual revolution/ liberation/ equality agenda.
In other words - the difference between the pre-1960s Old Left and the pre-60s New Left which has replaced it; is that sex, gender, sexuality and gender rights have now become the primary focus and method of Leftism (whether overtly, or covertly)
Why has this happened?
Because the sexual drive is so very strong - far stronger than most people's interest in politics, religion, law, business, arts, science, education, or anything else - that if it is not explicitly monitored and controlled, then sex will (whether covertly or openly, sooner or later) expand to displace any and every 'official' purpose or necessary social function.