The American Marxist movement may not have been born in Pittsburgh. But it was arguably conceived here, at a Downtown meeting hall long since replaced by office towers. What began as a chaotic meeting of labor activists would end with a pledge to form a new political party — the first to be rooted in Karl Marx’s ideas.
Over several contentious days in April 1876, representatives of unions and socialist groups from across the country gathered in Pittsburgh. Their goal: to form a nationwide labor movement, possibly even a united political party. The conference drew political outsiders of all stripes, from craft unionists to paper-money supporters to the mysterious (to outsiders, anyway) social democrats.