Donald A. Wollheim
Donald Allen Wollheim (October 1, 1914 – November 2, 1990) was an American science fiction editor, publisher, writer, and fan. As an author, he published under his own name as well as under pseudonyms, including David Grinnell.
A founding member of the Futurians, he was a leading influence on science fiction development and fandom in the 20th century United States.
Wollheim as fan
The Encyclopedia of Science Fiction (first edition, 1979) calls Wollheim "one of the first and most vociferous sf fans." He published numerous fanzines and co-edited the early Fanciful Tales of Space and Time. His importance to early fandom is chronicled in the 1974 book The Immortal Storm by Sam Moskowitz and in the 1977 book The Futurians by Damon Knight.
Wollheim organized the first science fiction convention. A group from New York met with a group from Philadelphia on October 22, 1936 in Philadelphia. The modern Philcon convention claims descent from this event. Out of this meeting, plans were formed for regional and national meetings, including the first Worldcon.