Explore how the discovery of genetics in the early 20th century initially seemed to challenge Darwin's theory of evolution, but ultimately provided the crucial missing piece that made evolutionary theory complete. Dr. Sarah Quinn examines the fascinating period known as the 'eclipse of Darwinism' and the brilliant scientists who resolved the apparent conflict between Mendelian genetics and natural selection. Learn about the Modern Synthesis, the unified theory that emerged in the 1930s and 1940s combining Darwin's insights with genetic mechanisms, population biology, and mathematical modeling. Discover how pioneers like Ronald Fisher, Theodosius Dobzhansky, and Ernst Mayr created the foundation of modern evolutionary biology. The episode traces how subsequent discoveries in molecular biology and DNA have continued to validate Darwin's original insights, showing that scientific theories grow stronger through integration rather than replacement. Perfect for listeners interested in the history of science, evolutionary biology, and how scientific understanding develops over time. Keywords: Charles Darwin, Modern Synthesis, evolutionary biology, genetics, Gregor Mendel, natural selection, Theodosius Dobzhansky, Ernst Mayr, Ronald Fisher, scientific history, evolution theory.