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Since I didn’t post last week I am posting two this week, sorry, here we go!

Thomistic cosmological argument

1. What we observe in this universe is contingent (i.e. dependent, or conditional)
2. A sequence of causally related contingent things cannot be infinite
3. The sequence of causally dependent contingent things must be finite

Conclusion: There must be a first cause in the sequence of contingent causes

Leibnizian cosmological argument

The argument comes from a German polymath, Gottfriend Wilhelm Leibniz. Leibniz wrote, “The first question which should rightly be asked is this: why is there something rather than nothing?”

The argument runs as follows:

1. Every existing thing has an explanation of its existence, either in the necessity of its own nature or in an external cause.
2. If the universe has an explanation of its existence, that explanation is God.
3. The universe is an existing thing.
4. Therefore the explanation of the universe is God.

Some atheists object to premise 2 in that God does not have to be the explanation, but that the universe can be what is called a necessary being (one which exists of its own nature and have no external cause). This was a suggestion of David Hume who demanded, “Why may not the material universe be the neccesarily existent being?” (Dialogues Concerning Natural Religion, part 9). The Kalam Cosmological Argument is helpful. If Hume (and other atheists) is right in saying that the universe is a necessary being/thing, then this implies that the universe is eternal. This is exactly what the Kalam argument seeks to disprove. Thus, the Kalam is a valuable supplement to the Leibnizian argument.