K is for Kollontai
The success of the Russian Revolution of 1917 enabled the radical ideas on women's liberation that had been germinating in pre-revolutionary times to develop, and be widely discussed and materially embodied in the real world.
A revolution turns all preconceived notions upside down. When profit held sway in the old society, it suppressed the needs and desires of the masses from whom it was extracted. These very needs and desires were to become the motive force of production in the new socialist society, both satisfying material requirements and, even more fundamentally, nourishing the human personality.