Read Katz's latest for Psychology Today

In a guest column for Psychology Today, Katz explores why people commit acts of evil. "Members of ISIS or Al Queda are not monsters insofar as they are not 'unique' but are instead 'terrifyingly normal,'" she writes. "That is, there are too many of them to dismiss and they are distributed all over the globe." Read the full post here and follow Katz on Twitter to see all her latest work.