Sir Patrick Geddes was a pioneering Scottish town planner in the late 19th/early 20th century. Some of his key contributions included: - Introducing the concepts of "region" and "conurbation" to urban planning. - Arguing that rural development, urban planning, and city design require different approaches and shouldn't follow a single process. - Developing the concept of the "valley section" to illustrate how a region influences and is influenced by its cities. - Coining the term "conurbation" to describe the merging of cities, towns, and urban areas through population growth and expansion. - Advocating a sequential approach to planning of regional survey, rural development