The role of Malebranche in understanding Berkeley. Malebranche, a follower of Descartes, very influential in France, is important in understanding Berkeley. Malebranche understands ‘what is it for one thing to cause another’ in terms of necessity; it must be, when A happens, B necessary follows. Why is this? Because the only real cause in universe is God, and God sustains the world by recreating it every instant (see Malebranche 1688, 1.10; 2.4; 3.5; 3.16).