The document discusses fiscal policy and how it can be used to influence the economy. It explains that John Maynard Keynes theorized that the government should get involved in the economy through taxing and spending policies. During recessions, the government can stimulate the economy by increasing spending or cutting taxes. This puts "money in people's pockets" and leads to recovery. The Great Depression changed traditional laissez-faire economic thinking by showing the economy does not always self-correct, necessitating a more active government role through Keynesian fiscal policies.