Who was jean De Lamarck?

Jean-Baptiste de Lamarck was an 18th-century French naturalist best known for his early theories of evolution. He proposed the idea of the inheritance of acquired characteristics, suggesting that organisms could pass traits acquired during their lifetime to their offspring. Lamarck's ideas laid the groundwork for later evolutionary theories, although they were largely overshadowed by Charles Darwin's natural selection. He also made significant contributions to the fields of invertebrate Biology and ecology.