Steven Pinker is a cognitive psychologist at Harvard, and is known for his work on evolutionary psychology and the theory that the mind is computational.
How the Mind Works - Steven Pinker
Thinking, Fast and Slow - Daniel Kahneman
Take everything you think you know about people being rational and throw it out the window.
Sapiens: A Brief History of Humankind - Yuval Noah Harari
I started reading this book expecting a history lesson, and closed it having my mind blown and my understanding of the world completely changed.