This report discusses the history of conservation planning and how we got to where we are today with these regional scale, ecosystem level habitat conservation plans and other similar types of projects.

Provides an overview of Pima County's (1) natural, constructed and administrative form makers, (2) the origins and implementation of planning and zoning legislation and regulations, and (3) a decade-by-decade review of some of the major land use decisions made within Pima County since the 1920s.