Ralph Cudworth was an English Anglican clergyman, Christian Hebraist, classicist, theologian and philosopher, and a leading figure among the Cambridge Platonists who became 11th Regius Professor of Hebrew (1645–88), 26th Master of Clare Hall (1645–54), and 14th Master of Christ's College (1654–88). A leading opponent of Hobbes's political and philosophical views, his magnum opus was his The True Intellectual System of the Universe (1678).

The Cambridge Platonists were an influential group of Platonist philosophers and Christian theologians at the University of Cambridge that existed during the 17th century. The leading figures were Ralph Cudworth and Henry More.