Wage labour (or wage labor) is the socioeconomic relationship between a worker and an employer, where the worker sells their labour under a formal or informal employment contract. These transactions usually occur in a labour market where wages are market determined. In exchange for the wages paid, the work product generally becomes the undifferentiated property of the employer, except for special cases such as the vesting of intellectual property patents in the United States where patent rights are usually vested in the original personal inventor. A wage labourer is a person whose primary means of income is from the selling of his or her labour in this way.

In modern mixed economies such as those of the OECD countries, it is currently the dominant form of work arrangement. Although most work occurs following this structure, the wage work arrangements of CEOs, professional employees, and professional contract workers are sometimes conflated with class assignments, so that "wage labour" is considered to apply only to unskilled, semi-skilled or manual labour.

Karl Heinrich Marx (5 May 1818 – 14 March 1883) was a German philosopher, economist, sociologist, historian, journalist, and revolutionary socialist. His ideas played a significant role in the development of social science and the socialist political movement. He published various books during his lifetime, with the most notable being The Communist Manifesto (1848) and Capital (1867–1894); some of his works were co-written with his friend and fellow German revolutionary socialist, Friedrich Engels.

Born into a wealthy middle class family in Trier, formerly in Prussian Rhineland now called Rhineland-Palatinate, Marx studied at both the University of Bonn and the University of Berlin, where he became interested in the philosophical ideas of the Young Hegelians. In 1836, he became engaged to Jenny von Westphalen, marrying her in 1843. After his studies, he wrote for a radical newspaper in Cologne, and began to work out his theory of dialectical materialism. Moving to Paris in 1843, he began writing for other radical newspapers. He met Engels in Paris, and the two men worked together on a series of books. Exiled to Brussels, he became a leading figure of the Communist League, before moving back to Cologne, where he founded his own newspaper. In 1849 he was exiled again and moved to London together with his wife and children. In London, where the family was reduced to poverty, Marx continued writing and formulating his theories about the nature of society and how he believed it could be improved, and also campaigned for socialism—he became a significant figure in the International Workingmen's Association.

William Henry "Bill" Gates III (born October 28, 1955 in Seattle, Washington) is an American business magnate, computer programmer and philanthropist. Gates is the former chief executive officer (CEO) and current chairman of Microsoft, the world’s largest personal-computer software company he co-founded with Paul Allen. He is consistently ranked among the world's wealthiest people and was the wealthiest overall from 1995 to 2009, excluding 2008, when he was ranked third; in 2011 he was the wealthiest American and the second wealthiest person. During his career at Microsoft, Gates held the positions of CEO and chief software architect, and remains the largest individual shareholder, with 6.4 percent of the common stock. He has also authored or co-authored several books.

Gates is one of the best-known entrepreneurs of the personal computer revolution. Gates has been criticized for his business tactics, which have been considered anti-competitive, an opinion which has in some cases been upheld by the courts. In the later stages of his career, Gates has pursued a number of philanthropic endeavors, donating large amounts of money to various charitable organizations and scientific research programs through the Bill & Melinda Gates Foundation, established in 2000.

Walter Edward Block (born 21 August 1941) is an Austrian School of economics economist and anarcho-capitalist.

Block was born in Brooklyn, New York to Abraham Block, a certified public accountant, and Ruth Block, a paralegal, both of whom Block has said were liberals. He earned his undergraduate degree in Philosophy summa cum laude from Brooklyn College, where he was a member of the varsity swimming team. Block earned his Ph.D. degree in economics from Columbia University and wrote his dissertation on rent control.^{[citation needed]} Block, who is of Jewish background, self-identifies as a "devout atheist".

Block's early thinking life was characterized by egalitarian thought. In an interview by the Austrian Economics Newsletter, Block stated, "In the fifties and sixties, I was just another commie living in Brooklyn." Block credits his "conversion" to Libertarianism to personal meetings with Ayn Rand while he was an undergraduate student. Alan Greenspan was in attendance at some of these meetings. As Block describes it, "In 1963, when I was a senior at Brooklyn College, Ayn Rand came there to give a lecture. I attended, along with about 3,000 of my fellow mainly leftish students, in order to boo and hiss her, since she was evil incarnate. Afterward, the president of the group that had invited her to campus announced there was to be a luncheon in her honor, and anyone was welcome to take part, whether or not they agreed with her ideas. Not having had enough booing and hissing at Ayn in her formal lecture, I decided to avail myself of this opportunity to further express my displeasure with her and her views."

Thomas Sowell (born June 30, 1930) is an American economist, social theorist, political philosopher, and author. A National Humanities Medal winner, he advocates laissez-faire economics and writes from a conservative and libertarian perspective. He is currently a Rose and Milton Friedman Senior Fellow on Public Policy at the Hoover Institution at Stanford University.

Sowell was born in North Carolina, but grew up in Harlem, New York. He dropped out of high school, and served in the United States Marine Corps during the Korean War. He received a bachelor's degree from Harvard University in 1958 and a master's degree from Columbia University in 1959. In 1968, he earned his doctorate degree in economics from the University of Chicago.

Sowell has served on the faculties of several universities, including Cornell and University of California, Los Angeles, and worked for think tanks such as the Urban Institute. Since 1980 he has worked at the Hoover Institution. He is the author of more than 30 books.