Rethink Mental Illness is a charity in England. Its mission statement is "Working together to help everyone affected by severe mental illness recover a better quality of life." The organisation was founded in 1972 by relatives of people diagnosed with schizophrenia, following an article by a journalist whose son had been diagnosed. The operating name of 'Rethink' was adopted in 2002 but the charity remains registered as the National Schizophrenia Fellowship, although it no longer focuses only on schizophrenia. The operating name was expanded in 2011 to be more self-explanatory.

ReThink (of voluit: The International ReThink Collective of Critical Citizens) is een collectief van mensen uit Nederlands Zuid-Limburg die op een vreedzame en inhoudelijke manier de kritische kanten van het neoliberalisme en de huidige globaliseringstrend willen belichten.