Liberalism is a politics ideology portrayed as the ideology of the industrialized Western world. Although liberals of all time never waver in their trust in protecting the "liberty" of people, this is of the term keeps changing as time passes. The main reason for this article is to examine the distinctions of traditional liberalism and modern liberalism. The first part provides this is of "liberalism" in general, concentrating on the distributed elements in every forms of liberalism. The next part will add the annals of liberalism, from traditional and modern liberalism till modern day neoliberalism, and try to illustrate the bond between their main doctrines and historical contexts. In the last part, I would closely study the distinctions between traditional and modern liberalism, and discuss the boundary between liberty and federal intervention in modern society.