Social liberalism (also known as modern liberalism in the U.S.) is a political ideology that believes the individual requires a level of social justice. Social liberalism endorses a market economy and the expansion of civil and political rights, and also believes the legitimate role of the government includes addressing economic and social issues such as poverty, health care and education. Under social liberalism, the good of the community is viewed as harmonious with the freedom of the individual. Social liberal policies have been widely adopted in much of the capitalist world, particularly following World War II. Social liberal ideas and parties tend to be considered centrist or centre-left.
The term "social liberalism" is used to differentiate it from classical liberalism, which dominated political and economic thought for a number of years until social liberalism branched off from it around the Great Depression.
In American political usage, the term "social liberalism" describes progressive stances on socio-political issues like abortion, same-sex marriage or gun control, as opposed to "social conservatism". A social liberal in this sense may hold either "liberal" or "conservative" views on fiscal policy.
By the end of the nineteenth century, the principles of classical liberalism were challenged by downturns in economic growth, a growing awareness of poverty and unemployment present within modern industrial cities and also by the agitation of organized labour. A major political reaction against the changes introduced by industrialisation and laissez-faire capitalism came from conservatives concerned about social balance, although socialism later became a more important force for change and reform. Some Victorian writers—including Charles Dickens, Thomas Carlyle and Matthew Arnold—became early influential critics of social injustice.