information:filtering
California

In 1934, Heinlein was discharged from the Navy, owing to pulmonary tuberculosis. During a lengthy hospitalization, and inspired by his own experience while bed-ridden, he developed a design for a waterbed.

After his discharge, Heinlein attended a few weeks of graduate classes in mathematics and physics at the University of California, Los Angeles (UCLA), but he soon quit, either because of his ill-health or because of a desire to enter politics.

Heinlein supported himself at several occupations, including real estate sales and silver mining, but for some years found money in short supply. Heinlein was active in Upton Sinclair 's socialist End Poverty in California movement (EPIC) in the early 1930s. He was deputy publisher of the EPIC News, which Heinlein noted "recalled a mayor, kicked out a district attorney, replaced the governor with one of our choice." When Sinclair gained the Democratic nomination for Governor of California in 1934, Heinlein worked actively in the campaign. Heinlein himself ran for the California State Assembly in 1938, but was unsuccessful. Heinlein was running as a left-wing Democrat in a conservative district, and he never made it past the Democratic primary.