After beginning with their own views, we will move to Popper’s contentious critique of historicism then to Hayek’s critique of both historicism and scientism. Then we finish with collectivism in both its two major meanings: methodological and moral. Both Popper and Hayek see all three “isms” as perverse methodologies, which, in turn, have perverse ethical and political implications. This means that they advance perverse political agendas and undermine alternative moral and political viewpoints; particularly those that Popper and Hayek argue underlie the Open Society.