Question: When was the economic ideology that created the framework for social credit developed?
Context: The Social Credit Party of Ontario (SCPO) (also known as the Ontario Social Credit League, Social Credit Association of Ontario and the Union of Electors) was a minor political party at the provincial level in the Canadian province of Ontario from the 1940s to the early 1970s.  The party never won any seats in the Legislative Assembly of Ontario.  It was affiliated with the Social Credit Party of Canada and espoused social credit theories of monetary reform. Glenville Lawrence MacLachlan (June 4, 1895 – January 28, 1973) was a provincial politician from Alberta, Canada.  He served as a member of the Legislative Assembly of Alberta from 1935 to 1940, sitting with the Social Credit caucus in government.  MacLachlan was one of the leaders of the 1937 Social Credit backbenchers' revolt and became chairman of the Social Credit Board, a body created as a result of the revolt, that had the purpose of overseeing the implementation of social credit economic theory in Alberta.  In 1940, the Social Credit Association denied him the right to run as a party candidate in that year's election. The New Zealand Democratic Party for Social Credit (shortened to Democrats for Social Credit) is a small leftist political party in New Zealand.  Its policies are based on the ideas of social credit.  The party has been known as the Social Credit Political League, Social Credit Party, and New Zealand Democratic Party and was part of the Alliance for a time. The Social Credit Board was a committee in Alberta, Canada from 1937 until 1948.  Composed of Social Credit backbenchers in the Legislative Assembly of Alberta, it was created in the aftermath of the 1937 Social Credit backbenchers' revolt.  Its mandate was to oversee the implementation of social credit in Alberta.  To this end, it secured the services of L. Dennis Byrne and George Powell, two lieutenants of social credit's British founder, C. H. Douglas. The Representative Party of Alberta (first registered as the Political Alternative Association and known as the Alternative Government Movement prior to registration in 1984) was a provincial political party in Alberta, Canada formed by former Alberta Social Credit Party parliamentary leader Raymond Speaker in 1984.  The party was right-of-centre, conservative in ideology and considered a modern version of Social Credit without the social credit monetary reform policy. Social credit is an interdisciplinary distributive philosophy developed by C. H. Douglas (1879–1952), a British engineer, who published a book by that name in 1924.  It encompasses economics, political science, history, and accounting.  Its policies are designed, according to Douglas, to disperse economic and political power to individuals.  Douglas wrote, "Systems were made for men, and not men for systems, and the interest of man which is self-development, is above all systems, whether theological, political or economic."  Douglas said that Social Crediters want to build a new civilization based upon "absolute economic security" for the individual, where "they shall sit every man under his vine and under his fig tree; and none shall make them afraid."  In his words, "what we really demand of existence is not that we shall be put into somebody else's Utopia, but we shall be put in a position to construct a Utopia of our own." The Social Credit Party of Canada (French: Parti Crédit social du Canada ), colloquially known as the Socreds, was a conservative-populist political party in Canada that promoted social credit theories of monetary reform.  It was the federal wing of the Canadian social credit movement. The Social Credit Party of Saskatchewan (originally known as the Social Credit League of Saskatchewan) was a political party in the Canadian province of Saskatchewan that promoted social credit economic theories from the mid-1930s to the mid-1970s. The Alberta Social Credit Party was a provincial political party in Alberta, Canada, that was founded on social credit monetary policy put forward by Clifford Hugh Douglas and on conservative Christian social values.  The Canadian social credit movement was largely an out-growth of the Alberta Social Credit Party.  The Social Credit Party of Canada was strongest in Alberta, before developing a base in Quebec when Réal Caouette agreed to merge his Ralliement créditiste movement into the federal party.  The British Columbia Social Credit Party formed the government for many years in neighbouring British Columbia, although this was effectively a coalition of centre-right forces in the province that had no interest in social credit monetary policies. Distributism (also known as distributionism or distributivism) is an economic ideology that developed in Europe in the late 19th and early 20th century based upon the principles of Catholic social teaching, especially the teachings of Pope Leo XIII in his encyclical "Rerum novarum" and Pope Pius XI in "Quadragesimo anno".  Many Christian Democratic political parties have advocated for distributism in their economic policies.
Answer: late 19th and early 20th century