America loves a good villain. From the pages of history books to the panels of comic books, our culture has produced some of the most memorable monsters, criminals, and antagonists the world has ever known. The villains on this list have transcended their origins to become symbols and cautionary tales. Some were born in writers’ imaginations, others committed real atrocities, but all have left an indelible mark on American consciousness. They remind us that the line between ordinary and monstrous can be thinner than we’d like to admit.