Romantic and parental love, passion, sex, mutual obligations, fidelity, betrayal - this book presents them in the light of the latest scientific discoveries. Renowned British anthropologist and evolutionary psychologist, Oxford University professor Robin Dunbar, examines the nature of these mysterious phenomena and shows how evolutionary “programming” still influences our behavior. This fascinating study of romantic relationships is the answer to everyone who has ever asked themselves the question at least once in their life: why do we fall in love and what happens to us?