Galileos principle of inertia replaced the Aristotelian distinction between natural motions.

Evidence

Galileo held, as against this view, that every body, if left alone, will continue to move in a straight line with uniform velocity; any change, either in the rapidity or the direction of motion, requires to be explained as due to the action of some ‘force’. This principle was enunciated by Newton as the ‘first law of motion’. — Bertrand Russell, History of Western Philosophy, 1961

Categorization

• XREF: XREF designates the foundational shift in how humans understand motion and physical laws. — connects to: Aristotelian physics directly contradicts the Newtonian law of uniform inertial motion — Bertrand Russell, History of Western Philosophy, 881; Greeks modeled physical motion on biological life rather than mechanical machines — Bertrand Russell, History of Western Philosophy, 866; The law of inertia and momentum made outside divine intervention unnecessary for planetary motion. — Bertrand Russell, History of Western Philosophy, 1978 (+1 more)
• corroborated: 2 independent passages support this claim — Bertrand Russell, History of Western Philosophy, 1961

Broader Connections

• The law of inertia and momentum made outside divine intervention unnecessary for planetary motion. #expands (0.60) — Bertrand Russell, History of Western Philosophy, 1978