Steven Pinker is a professor in the Department of Psychology at Harvard University. He conducts research on language and cognition and has authored ten books, including:
The Language Instinct
How the Mind Works
The Blank Slate
The Stuff of Thought
The Better Angels of Our Nature
and most recently, The Sense of Style: The Thinking Person’s Guide to Writing in the 21st Century.
The Stuff of Thought full video: https://www.youtube.com/watch?v=hBpetDxIEMU