This Idea Must Die

There is a naive belief that science advances along a straight, peaceful path, stacking bricks of irrefutable truth on an unchanging foundation. Physicist Max Planck used to say that a new scientific truth triumphs not by convincing its opponents, but because those opponents die and a new generation grows up familiar with it. The real obstacle to discovery is often not ignorance, but a stubborn attachment to outdated concepts that seem obvious to people of their time.

John Brockman, creator of the movement known as the third culture, asked nearly two hundred of the world's leading scientists and thinkers a direct, uncomfortable question: Which scientific idea is ready for permanent retirement? Their responses, collected in this book, offer an extraordinary overview of the conceptual constraints holding back contemporary physics, biology, psychology, and philosophy.

Discarding a respected theory is not an act of disrespect toward the pioneers of the past. It is the greatest tribute the empirical method can pay to the search for truth. For new seeds to sprout in modern research, we must clear away the dead roots of conventional thinking that have lost touch with observable reality.

Biologist Richard Dawkins points to an ancient philosophical trap dating back to Plato: the belief in essentialism. This perspective holds that every living species, every mineral, and every phenomenon has a perfect, pure, unchanging essence in the world of ideas, while individual variations are merely imperfect copies of an ideal mold.

Dawkins shows that this very habit of thought delayed the discovery of evolutionary theory for more than two millennia. If you believe that an ideal rabbit exists, fixed forever, it becomes almost impossible to imagine that a continuous lineage of gradually changing ancestors transformed fish into reptiles and reptiles into mammals. In the natural world, there are no rigid boundaries, only uninterrupted gradients and small mutations unfolding over geological ages.

Overcoming the essentialist illusion is indispensable to understanding modern biology. The obsession with sealed-off categories still infects debates about race, gender, and human behavior, creating arbitrary divisions where biology sees only fluid continuities and perfectly natural variations in life.

For more than a century, the human and biomedical sciences exhausted themselves in a futile tribal war: Are human traits determined by biological genes or by cultural upbringing at home? Linguist and psychologist Steven Pinker argues that the simplistic formula separating nature and nurture into rival forces is a failed intellectual model that needs to be discarded.

Biological development does not work like a cake recipe calling for one cup of DNA and two cups of maternal influence. Genes are not rigid operators that dictate destiny, but responsive programs switched on or silenced by environmental stimuli, nutrition, stress, and learning. Every lived experience reconfigures neural connections and modulates cellular expression itself.

Abandoning this dichotomy allows contemporary psychology to investigate how biology and society are inseparably intertwined, ending decades of sterile polarization between genetic determinists and radical sociologists that only delayed our understanding of the human mind.