In Who We Are and How We Got Here, David Reich combines his expertise in genetics with groundbreaking archaeological and historical research to unravel the story of human history through the lens of our DNA. By studying ancient and modern genomes, Reich sheds light on how populations have migrated, mixed, and evolved over millennia. The book dives deep into the origins of human populations and explores how genetics has shaped both ancient and contemporary societies. Reich discusses how human history was shaped by the migrations of different groups, how the genetic landscape of humanity has been influenced by ancient events such as the rise and fall of empires, and how this knowledge can affect our understanding of race, identity, and health. The book also addresses the ways in which modern technology, particularly advances in DNA analysis, are revolutionizing our understanding of human history. It challenges traditional notions of racial and cultural identity, offering a fresh, science-driven perspective on who we are and where we came from.