We might argue about whether Donald A Wollheim is the most significant figure in 20th Century science fiction[1] but there can be little doubt about the influence he had on the development of modern science fiction and fantasy[2] is both broad and deep.
He leapt onto the stage early as an ardent fan, and immediately began to shape history: from his proposal for what is arguably the first science fiction convention,[3] through his championing of the fanzine platform via newly-affordable home-printing technologies,[4] and into his uncanny understanding of the potential of rapidly cheapening media such as the pulps and pocketbooks as a platform to make SFF grow[5], his contributions to building the SFF publishing world we know today were enormous.[6]
But where I think Wollheim’s most interesting influence really shows is in his editorial hand.