John Stuart Mill in the context of "Classical economics"

Direct democracy or pure democracy is a form of democracy in which the electorate directly decides on policy initiatives, without elected representatives as proxies, as opposed to the representative democracy model which occurs in the majority of established democracies. The theory and practice of direct democracy and participation as its common characteristic constituted the core of the work of many theorists, philosophers, politicians, and social critics, such as Jean-Jacques Rousseau, John Stuart Mill, and G.D.H. Cole.

Civil liberties are fundamental rights and freedoms that governments pledge not to restrict, either through constitutions, legislation, or judicial interpretation, without due process of law. Although the scope of civil liberties differs between countries, they often include the freedom of conscience, freedom of the press, freedom of religion, freedom of expression, freedom of assembly, personal security, personal liberty, freedom of speech, right to privacy, equality before the law, due process of law, the right to a fair trial, and the right to life. Other civil liberties include the right to own property, the right to defend oneself, and the right to bodily integrity. Within the distinctions between civil liberties and other types of liberty, distinctions exist between positive liberty/positive rights and negative liberty/negative rights.

Libertarians advocate for the negative liberty aspect of civil liberties, emphasizing minimal government intervention in both personal and economic affairs. Influential advocates of this interpretation include John Stuart Mill, whose work On Liberty argues for the protection of individual freedoms from government encroachment, and Friedrich Hayek, whose The Road to Serfdom warns against the dangers of expanding state power. Ayn Rand's Atlas Shrugged and Ron Paul's The Revolution: A Manifesto further emphasize the importance of safeguarding personal autonomy and limiting government authority. These contributions have played a significant role in shaping the discourse on civil liberties and the appropriate scope of government.

In philosophy, economics, and political science, the common good (also commonwealth, common weal, general welfare, or public benefit) is either what is shared and beneficial for all or most members of a given community, or alternatively, what is achieved by citizenship, collective action, and active participation in the realm of politics and public service. The concept of the common good differs significantly among philosophical doctrines. Early conceptions of the common good were set out by Ancient Greek philosophers, including Aristotle and Plato. One understanding of the common good rooted in Aristotle's philosophy remains in common usage today, referring to what one contemporary scholar calls the "good proper to, and attainable only by, the community, yet individually shared by its members."

The concept of common good developed through the work of political theorists, moral philosophers, and public economists, including Thomas Aquinas, Niccolò Machiavelli, John Locke, Jean-Jacques Rousseau, James Madison, Adam Smith, Karl Marx, John Stuart Mill, John Maynard Keynes, John Rawls, and many other thinkers. In contemporary economic theory, a common good is any good which is rivalrous yet non-excludable, while the common good, by contrast, arises in the subfield of welfare economics and refers to the outcome of a social welfare function. Such a social welfare function, in turn, would be rooted in a moral theory of the good (such as utilitarianism). Social choice theory aims to understand processes by which the common good may or may not be realized in societies through the study of collective decision rules. Public choice theory applies microeconomic methodology to the study of political science in order to explain how private interests affect political activities and outcomes.

A natural monopoly is a monopoly in an industry in which high infrastructure costs and other barriers to entry relative to the size of the market give the largest supplier in an industry, often the first supplier in a market, an overwhelming advantage over potential competitors. Specifically, an industry is a natural monopoly if a single firm can supply the entire market at a lower long-run average cost than if multiple firms were to operate within it. In that case, it is very probable that a company (monopoly) or a minimal number of companies (oligopoly) will form, providing all or most of the relevant products and/or services. This frequently occurs in industries where capital costs predominate, creating large economies of scale in relation to the size of the market; examples include public utilities such as water services, electricity, telecommunications, mail, etc. Natural monopolies were recognized as potential sources of market failure as early as the 19th century; John Stuart Mill advocated government regulation to make them serve the public good.

Mary Somerville (née Fairfax, formerly Greig; 1780–1872) was a Scottish scientist, writer, and polymath. She studied mathematics and astronomy, and in 1835 she and Caroline Herschel were elected as the first female Honorary Members of the Royal Astronomical Society.

In John Stuart Mill's 1866 mass petition to the UK Parliament to grant women the right to vote, the first signature on the petition was Somerville's, which she signed before the age of 86.

Isidore Auguste Marie François Xavier Comte (/kɒnt/; French: [oɡyst(ə) kɔ̃t] ; 19 January 1798 – 5 September 1857) was a French philosopher, mathematician and writer who formulated the doctrine of positivism. He is often regarded as the first philosopher of science in the modern sense of the term. Comte's ideas were also fundamental to the development of sociology, with him inventing the very term and treating the discipline as the crowning achievement of the sciences.

Influenced by Henri de Saint-Simon, Comte's work attempted to remedy the social disorder caused by the French Revolution, which he believed indicated an imminent transition to a new form of society. He sought to establish a new social doctrine based on science, which he labeled positivism. He had a major impact on 19th-century thought, influencing the work of social thinkers such as John Stuart Mill and George Eliot. His concept of Sociology and social evolutionism set the tone for early social theorists and anthropologists such as Harriet Martineau and Herbert Spencer, evolving into modern academic sociology presented by Émile Durkheim as practical and objective social research.

In economics, utility is a measure of a certain person's satisfaction from a certain state of the world. Over time, the term has been used with at least two meanings.

• In a normative context, utility refers to a goal or objective that we wish to maximize, i.e., an objective function. This kind of utility bears a closer resemblance to the original utilitarian concept, developed by moral philosophers such as Jeremy Bentham and John Stuart Mill.
• In a descriptive context, the term refers to an apparent objective function; such a function is revealed by a person's behavior, and specifically by their preferences over lotteries, which can be any quantified choice.

The relationship between these two kinds of utility functions has been a source of controversy among both economists and ethicists, with most maintaining that the two are distinct but generally related.