The purpose of this paper is to treat the similarly and differences of liberalism. I will use John Locke and Adam Smith to represent classical liberals. John Stuart Mill and John Maynard Keynes will be used to show contemporary liberals.
John Locke
In John Locke's Second Treatise of Government he develops a theory of government as a product of a social contract, which when broken justifies the creation of a new government for the protection of life, liberty and property.
He begins his argument by developing a theory of the state of nature which is
...what state all men are naturally in, and that is, a state of perfect freedom to order their actions and dispose of their possessions and persons as they think fit, within the bounds of the law of nature, without asking leave or depending upon the will of any other man.1
The state of nature includes the "...law of nature to govern it, which obliges everyone; and reason, which is that law, teaches all mankind who will but consult it..."2 The state of nature also includes inequality
...since gold and silver, being little useful to the life of a man in proportion to food, raiment, and carriage, has its value only from the consent of men, whereof labour yet makes, in great part, the measure, it is plain that men have agreed to a disproportional and unequal possession of the earth.3
In Locke's state on nature there are also three distinct problems. First there is no established settled known law. As each man consults his own law of nature he receives a slightly different interpretation. Secondly there no known and indifferent judge. Which creates the problem of trying to decide which is the correct law of nature which will be followed in an impartial manor. Thirdly there is insufficient force of execution. This is the problem of how to carry out the decision of the law of nature