Over at Slate, Jacob Brogan writes about the origin of superheroes not killing:
The industry as a whole didn’t adopt a collective set of standards until 1954, when prominent publishers banded together to form the Comics Code Authority in response to Wertham’s attacks and the congressional hearings they inspired. Long before, however, DC’s prominent characters provided a tacit model for every superhero that would follow. Accordingly numerous other costumed adventurers who refused to kill would appear in the years after Ellsworth laid down the law: Spider-Man wraps thieves up in webbing, the Fantastic Four banish their enemies to the Negative Zone, and Netflix’s Daredevil tosses would-be assassins into dumpsters. By editorial fiat, Ellsworth had effectively imposed a principle that comics storytellers still follow today, three-quarters of a century after the moral panic that inspired it.