In 1884, a group of British intellectuals decided socialism didn't need a revolution it just needed time they took their name from a Roman general who beat Hannibal by refusing to fight head on.  Wear the enemy down and do it slowly their strategy was simple don't storm the palace just move into it.  Write the policy.  Train the experts.  Advise the politicians.  Change the system one law at a time until one day you look up and everything's done.  And in Britain it worked.

In 1918, Sydney Webb, one of the leading Fabians wrote Labor Clauses number four