Education reform has been pursued for a variety of specific reasons, but generally most reforms aim at redressing some societal ills, such as poverty-, gender-, or class-based inequities, or perceived ineffectiveness. Reforms are usually proposed by thinkers who aim to redress societal ills or institute societal changes, most often through a change in the education of the members of a class of people—the preparation of a ruling class to rule or a working class to work, the social hygiene of a lower or immigrant class, the preparation of citizens in a democracy or republic, etc. The idea that all children should be provided with a high level of education is a relatively recent idea, and has arisen largely in the context of Western democracy in the 20th century.
States have tried to use state schools to increase state power, especially to make better soldiers and workers. This strategy was first adopted to unify related linguistic groups in Europe, such as Germany and Italy. Exact mechanisms are unclear, but it often fails in areas where populations are culturally segregated, as when the U.S. Indian school service failed to suppress Lakota and Navaho, or when a culture has widely-respected autonomous cultural institutions, as when the Spanish failed to suppress Catalan.
Many students of democracy have desired to improve education in order to improve the quality of governance in democratic societies; the necessity of good public education follows logically if one believes that:
1. the quality of democratic governance depends on the ability of citizens to make informed, intelligent choices, and
2. education can improve these abilities.
Politically-motivated educational reforms of the democratic type are recorded as far back as Plato, whose book The Republic was essentially a thought experiment on education reform. In the United States of America, this lineage of democratic education reform was continued by Thomas Jefferson, who advocated ambitious reforms partly along Platonic lines for public schooling in Virginia.
Another motivation for reform is the desire to address socioeconomic problems, which many people see as having significant roots in lack of education. Starting in the twentieth century, people have attempted to argue that small improvements in education can have large returns in such areas as health, wealth and well-being. For example, in Kerala, India in the 1950s, increases in women's health were correlated with increases in female literacy rates. In Iran, increased primary education was correlated with increased farming efficiencies and income. In both cases some researchers have concluded these correlations as representing an underlying causal relationship: education causes socioeconomic benefits. In the case of Iran, researchers concluded that the improvements were due to farmers gaining reliable access to national crop prices and scientific farming information.