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Past failures don't define the future of socialism
(thelemmy.club)
The people before us weren't perfect. Their mistakes are blueprints to learn from and build a better world
The Women's Liberation and Gay Liberation Movements by Huey P. Newton
Transgender Liberation: A Marxist View by Leslie Feinberg
The Problem of Recognition in Transitional States, or Sympathy for the Monster by Nia Frome
These are all great places to start for Marxist views on the LGBTQIA+ movement. Trans rights are human rights.
For an intro to Marxism-Leninism in general, I wrote this basic study guide.