Planning involves shaping the future through processes like determining future actions, improving settlements, promoting equity and citizen participation. Planners come from various backgrounds and work in government, non-profits and private sectors. They represent the public, assist decision-makers and deal with complex problems. However, planners accomplish little alone and must work with various stakeholders. Planning is inherently political due to its impact and need for support. Key debates in planning theory include defining planning's history and roles, justifying intervention, determining appropriate approaches, and balancing expertise with public values.