"An oppressed class which does not strive to learn to use arms, to acquire arms, only deserves to be treated like slaves" - Vladimir Lenin
Every leftist should at least read Lenin. He managed to apply Marxist analysis to the conditions of Capitalism as it developed past Marx, something every Leftist can learn from. Obligatory links:
The State and Revolution
Imperialism, the Highest Stage of Capitalism
also what is to be done?