Neil deGrasse Tyson

In his new book, Accessory to War, the astrophysicist argues that people who work in his field are often complicit to military development — despite being overwhelmingly liberal and anti-war.

The astrophysicist says that participating in a "great unfolding of a cosmic story" should make us feel large, not small. This spring, Tyson hosts a TV series called Cosmos: A Space-Time Odyssey.