a. Political gathering
b. London, United Kingdom
c. This was a gathering of far-left political activists organized by Karl Marx. Marx was a tireless organizer, he believed that the working class had to constantly prepare for the upcoming struggle by organizing socialist parties. The First International, for any of those that sought to "protect, advance, and complete emancipation of the working classes." Trade Unionists, Italian nationalists, Marxists, and Anarchists.