"Thinking, Fast and Slow" by Daniel Kahneman is a renowned book that explores the two systems of thinking that govern our cognition:

System 1:
This is the fast, automatic, and intuitive mode of thinking. It operates effortlessly and quickly, drawing on heuristics and patterns to make snap judgments and decisions.
System 2:
This is the slower, more deliberate, and analytical mode of thinking. It involves conscious reasoning, logic, and effortful mental processes.

I think Kahneman's work has had a profound impact on our understanding of decision-making, cognitive biases, and human behaviour.