Conversation so far:
what part did jack have in socialism?
London joined the Socialist Labor Party in April 1896.
what was his part in the party?
London wrote from a socialist viewpoint.
what was his viewpoint?
", his views were influenced by his experience with people at the bottom of the social pit.
what was his experience with them like?
His optimism and individualism faded, and he vowed never to do more hard physical work than necessary.
what changes did he make with the party?
CANNOTANSWER.
Who did he work with?
CANNOTANSWER.
Are there any other interesting aspects about this article?
In 1916, he resigned from the Glen Ellen chapter of the Socialist Party.

Question: what did he do after he left?
Self-contained rewrite: What did Jack London do after he left the Socialist Labor Party?