The School of Philosophy and Economic Science (SPES), also operating under the names the School of Philosophy and the School of Practical Philosophy and legally named the School of Economic Science (SES), is a worldwide organisation based in London. It offers non-academic courses for adults, ranging from an introductory series called Practical Philosophy to more advanced classes. Its teachings are principally influenced by Advaita Vedanta, an orthodox philosophical system of Hinduism. It has a guru, Sri Vasudevananda Saraswati, who used the title Shankaracharya until 2017. The organisation has been the subject of controversy, especially historical child abuse that it confirmed was criminal. It has a dress code and advocates a conservative lifestyle, with traditional gender roles and sexual mores. It has been described as a cult, sect or new religious movement.

Henry George was an American political economist and journalist. His writing was immensely popular in 19th-century America and sparked several reform movements of the Progressive Era. He inspired the economic philosophy known as Georgism, the belief that people should own the value they produce themselves, but that the economic value of land should belong equally to all members of society. George famously argued that a single tax on land values would create a more productive and just society.