In a "billiard-ball world" of Newtonian science, causation was obvious—things had to touch each other in space and a cause always had to precede an effect. But quantum mechanics destroys such notions. What then is causation? Moreover, must causes always be physical? Is "mental causation" a coherent concept? What about "top-down causation"? Donate to Closer To Truth and help us keep our content free and without paywalls: https://shorturl.at/OnyRq Free access Closer to Truth's library of 5,000 videos: http://bit.ly/2UufzC7 Watch more interviews with Robin Le Poidevin: http://bit.ly/2UtUA25 Watch more interviews on causation: http://bit.ly/2UrFyKg