Assuming you're an anarchist or otherwise leftist radical, what radicalized your position?
For me it was a combination of seeing the rampart corruption of the Greek state and the sloth and hypocrisy of the KKE in my own family. Then afterwards it was the alienation of my own wage-slavery.
Climate catastrophe and burnout and want to get into politics to maximize my impact on the world. Then I searched over most ideologies, finding anarchism the most compatible with critical thinking.