This remarkable volume pays tribute to the esteemed Helmuth Nyborg on his 85th birthday. Recognised globally for his groundbreaking work on the inheritance of intelligence and the relationship between race, sex and intelligence, Nyborg's contributions have shaped the trajectory of developmental psychology. In honour of his contributions, top experts from across the world have assembled to critically examine and celebrate Nyborg's work. Each chapter of this Festschrift starts by exploring Nyborg's contribution to a specific topic, then delves into subsequent research that his work has stimulated. It also discusses potential amendments or enrichments to his theories, providing a thorough and constructive critique. These essays conclude with future-oriented speculations, shedding light on potential trajectories within intelligence studies. Thus, this book not only marks Nyborg's momentous birthday but also serves as a platform for thought-provoking discussions about the future of the field, truly a testament to his indelible impact.