What time period did the naturalist Lamarck live in?

Jean-Baptiste Lamarck was an important figure in the early development of evolutionary biology. He lived during the 18th and early 19th centuries, specifically from August 1, 1744, until December 18, 1829. This places his life predominantly in the 1700s, with his most influential work occurring in the late 1700s and early 1800s. Choosing the time period from 1700-1800 accurately encompasses Lamarck's life and contributions to science, including his ideas about inheritance and adaptation that preceded Darwin's theory of natural selection. This answer reflects the context of his work within the scientific exploration of biology and evolution during that time.