Does MSU Study Show People Are Born Jerks?

A new study by researchers at MSU on brain function vs. positive and negative thoughts suggests that people are hard-wired as optimists or pessimists, according to an article on the Michigan State University website.

For clarification, I've reached out to lead psychologist, Jason Moser, on one very important question:

Are people born jerks?

Because this would explain a lot.

Standby...