Darwin's theory of evolution, while revolutionary, has faced criticisms and identified flaws which have led to refinements rather than a complete abandonment of evolutionary concepts. Key issues include the conflict between gradualism, which suggests steady evolutionary change, and punctuated equilibrium, which posits that species experience long periods of stability interrupted by rapid evolutionary changes. Both models struggle to fully explain the diversity of life. Additionally, there is a significant distinction between microevolution—small adaptations within a species—and macroevolution, the emergence of entirely new species. Evidence for microevolution is clear, but proving broader evolutionary changes remains challenging, with limits on how much a species can genetically alter. The Modern Synthesis has integrated genetic insights into evolutionary theory, enhancing our understanding of mechanisms like natural selection and speciation. Studies on isolated populations, such as Darwin’s finches, illustrate how environmental factors can accelerate evolutionary changes. Evidence from paleontology, comparative anatomy, and biogeography consistently supports biological evolution, showing a clear sequence in the fossil record and common ancestry among different organisms. These refinements highlight that while the original theory had limitations, the overall framework of evolution continues to evolve with scientific advancements.