Rupert is an Associated Professor of Philosophy at the University of East Anglia, author of seven books on a range of subjects and specialises particularly in Wittgenstein, philosophy of film, and environmental philosophy. He is also a blogger and a climate and environmental campaigner. Rupert previously chaired the Green House think tank, and is a former Green Party of England and Wales councillor, spokesperson, European parliamentary candidate and national parliamentary candidate. Recently Rupert has become a spokesperson for the Extinction Rebellion protest movement. This has included debates with government ministers and backbenchers on national television and radio; as well as meetings with senior politicians from across the political spectrum.