The results of this worldwide educational inequality is a social concern for many countries, including the United States. This article discusses the historical past of education, tracing the evolution of the formal instructing of knowledge and expertise from prehistoric and ancient instances to the present, and contemplating the assorted philosophies that have impressed the resulting methods. For a therapy of education as a discipline, together with educational organization, teaching methods, and the features and training of teachers, see instructing; pedagogy; and instructor education. For a description of education in various specialized fields, see historiography; legal education; medical education; science, history of. For an evaluation of instructional philosophy, see education, philosophy of.