The book "Government by Plan: How Strategic Planning Transformed Public and Nonprofit Management" argues that strategic planning has become an essential tool for public and nonprofit organizations. The book explores how strategic planning can be used to improve organizational performance, increase efficiency, and achieve greater accountability. In other words, it examines how planning can help these organizations achieve their goals more effectively. Strategic planning is a process that involves setting goals, identifying resources, and developing a plan to achieve those goals. It can be a helpful tool for any organization, but it is especially important for public and nonprofit organizations that are accountable to the public and have limited resources.