Thomasianism is a political and philosophical movement based in Mordusia. Developed between the mid 2130s through to the end of the 2160s Thomasianism was developed by the leading politicians Geraint Thomas and his associates. In many was it was the forerunner and main opponent of the rival Mordusian philosophy Lombasianism and heavily influenced by Plinioism. It is the guiding philosophy of the Thomasian Nationalists.