Robert Heinlein

Robert Heinlein (born 1907-died 1988) was a prolific science fiction writer responsible for many novels that addressed fundamental issues of his day and expressed predictions of society and it's general direction. One of his more well known (and probably the most t/g related) novel is Starship Troopers which (written in 1959) serves as the inspiration for "Space Marine" as a general concept, not that GW would ever admit that. He began his adult life working as a naval officer for the U.S. military and conveniently came down with a case of tuberculosis in 1934 before the outbreak of the Second World War. He began his writing career soon after and many of his topics centered around certain social themes including an individual's obligation to society and his own responsibility to remain self-reliant, the amount of influence that a major religion could exert onto a society, and the inevitable diaspora that pertains to humanity's ability to develop space travel.

There are a few contributions that he did make to science fiction and by extension to fat/guy culture itself such as:

• The "World-as-Myth" concept.
• The word "Waldo".
• Created the first design for a waterbed (though never patented it).
• Many ideas and themes of 40K's Imperium of Man such as diaspora (see Age of Strife), religious government turning into an oppressive regime, persecution of mutants, and many of the negative effects of interplanetary space travel (not so much the warp (that belongs firmly to H.P. Lovecraft) but more so the amount of cultural differences and the recurring theme of rebellion among governed planets).
• One of his characters "Lazarus Long" may have directly inspired Ollanius Pius.

His works also contain a disturbing amount of (what was considered) sexual deviancies at the time including polygamy, incest, bi- and homo- sexuality, interracial and interspecies relations, and general sexism. A definite vibe of Slaanesh worship can be found in his books.