I adore her writing. She is super passionate, super clever, and also really loves sick burns. Reform or Revolution is an entire fifty-page shut-down of Bernstein, and she tears the fuck into him. It’s all about how you can’t create socialism through capitalist reform.

If you’re going to give just one bit of her writing a try, I would say the Junius Brochure which she wrote while in prison, and was smuggled out, in which she rails against the senseless inter-proletarian murder of the first World War and calls for an international unity of workers to rise up against the capitalists that send them to their deaths for profit