display | more...
I wonder who came up with this idea.

Causality conceives of the world as being held adrift by chains of causal relations, forming a partial order of events/states of affairs/acts/mechanisms. The cause necessarily results in the effect.

The main problem: how to define necessity? How do we distinguish between coincidence and a causal relation?

Some people cannot conceive of infinite partial orders, and without good reason, assume a first cause.