Writing in 1912, Bertrand Russell declared talk of causes and of causality to be obsolete, noting its elimination from scientific theory as he saw it: “in advanced sciences such as gravitational astronomy, the word 'cause' never occurs .... The law of causality, I believe, like much that passes muster among philosophers is a relic of a bygone age, surviving, like the monarchy, only because it is erroneously supposed to do no harm.” Causal laws, he claimed, “tend to be replaced by quite different laws as soon as a science is successful.”