This is a lecture course that will outline how the human brain develops from a microscopic cluster of cells, through fetal development, to the moment of birth and beyond. It will seek to explain how the human brain is unique in terms of the enormous variety of cells of which it is composed, and the complexity of the connections between them. It will characterise the major features in evolution and development that have led to the emergence of this powerful thinking machine. Finally, we will take a tentative look at how neurodiversity arises, and why each of us is unique. There is no course work or preparatory reading, but a basic knowledge of Biology (O-level) would be an asset.