Robert Hare

So we need to understand the key characteristics of psychopaths and psychopathy.

And one of the great books, people have done amazing research out there, is Harvey Cleckley, the classical book, The Mask of Sanity, and Robert Harris, Without Conscience.

And based on their work and others as well, it comes down to really three main characteristics of psychopaths.

And the number one, we mentioned it as well, is the complete absence of conscience, guilt, and remorse.