Philosophy / Unit 3 Philosophy 0105 short lesson, about 20 seconds
The First-Cause Argument
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The idea
The first-cause argument: everything that exists has a cause; an infinite chain of causes explains nothing; therefore an uncaused first cause—God—exists.
In practice
Aquinas made it the second of his Five Ways: trace any motion or effect backward and the chain must start somewhere.
Your place on the trail
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Builds on
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