Saxon White Anglo Male Protestant
...which is becoming extinct, but not without a lot of thrashing around, risking detonation of the entire world: Dawkins, Hitchens, ...it goes on.
How did this happen?
The essential attribute is lack of insight. The inability to distinguish between a dispassionate interest in the truth and gonadal/brain-stem reasoning cloaked with pseudo-rational "thinking" is the hallmark of the species.
Issac Newton spent his later career studying alchemy. We can all do this. An interest in the truth , however defined, is what separates the crows from the goats.