This document defines liberty and discusses its various kinds. It begins by defining liberty as the absence of restraints that allow individuals to better themselves and defines its two aspects as negative and positive liberty. It then lists and describes five kinds of liberty - natural, national, civil, political, and economic. Civil liberty includes rights like freedom of thought and association, while political liberty involves citizen participation in government. Economic liberty is the right to work and choose a profession. The document also discusses civil rights, economic rights, and the right to property.