Robert E. Park was an influential American sociologist, born in 1864 and known for his work in urban sociology and social ecology. He was a key figure in the Chicago School of Sociology, which focused on the study of social behavior in urban environments. Park emphasized the importance of understanding the relationship between individuals and their social surroundings. Park's research contributed significantly to the development of sociological theories about community and social interaction. He introduced concepts such as the "marginal man," which describes individuals who exist between two cultures. His work laid the groundwork for future sociological studies and remains relevant in understanding urban life today.