I gave up my belief in God after reading Albert Camus and other existentialists at age 14, and Sartre put me onto quite a bit of Marxism. I hung a hammer and sickle flag above the English Literature block of my conservative Anglican private school at age 16, so I was very radicalised by then.
In early uni I read Capital Volume 1, and did a lot of fun exploration of revolutionary anti-capitalism in my essays.
Unfortunately it took me a long time to explicitly bring my anti- authoritarianism into my own personal principles; it’s only in the last few years have I given up calling myself a Libertarian Marxist, and just saying ‘anarchist’. Although, I frequently have to clarify that my branch of anarchism is libertarian communist/socialist, and not, say, something radically different.
I have somewhat of a long story, and it’s very boring, but I spent a lot of time as an activist, and thoroughly enjoyed it.