From the French Revolution (1789) to modern times, various significant theories created by philosophers, scholars, social scientists, politicians and economists. Rousseau to Kant, Adam Smith to John Stuart Mill, Proudhon to Comte, Marx to Bernstein, Ricardo to Mazzini, many approaches considered as milestones introduced into the environment of different studies. However, during the timeline spanning four centuries (18th, 19th, 20th, 21st), societies have evolved significantly as the fundamental assumptions of previous communities are replaced. As the foundations of political theories have evolved from state centralism to individualism, the study of economics, accordingly, has evolved in favor of an individual-based environment. As concepts and theories are introduced, new systems subsequently emerge in both political and economic terms. After centuries of wars and destruction, starting from the second half of the 20th century, the capitalist system began to overshadow its dominance. The efficiency of armed struggles and arms races between states is called into question. Especially after the fall of the Berlin Wall, the superiority of liberal ideals became more firmly accepted. Within this conventional process context, analysis of this evolutionary timeline will expose an answer to the question: “Why do we seem to focus “more” on the distribution of income among families or individuals today?” On the other hand, it would be unfair to say that individualist approaches have emerged only recently. When Adam Smith explained his thoughts on “private interests” and “public benefit” in the late 18th century, no one can accurately argue that those ideas will change the situation. stream of social sciences. He said the company's annual revenue always equals the exchange... at the heart of the paper... an efficient welfare state. However, by analyzing individuals separately, the study will show that there are groups of people who belong to different economic sectors of society. Since crucial questions such as growth theory and many others require the integration of sub-disciplines of economics, including labor economics, using both macro and micro approaches on analysis. Works Cited A. Atkinson “Factor Shares: The Main Problem of Political Economy?” Oxford Review of Economic Policy, volume 25, number 1, 2009, pp.3–16Marx, Karl, Friedrich Engels, Samuel Moore, and David McLellan. The Communist Manifesto. Oxford: Oxford University Press, 1992.Mill, John. S., “On Liberty”, The Floating Press, 2009 (from a 1909 edition). Smith, Adam, An Inquiry into the Nature and Causes of the Wealth of Nations. Edwin Cannan, ed. 1904. Library of Economy and Freedom.