(1) Objects are in motion.
(2) If something is in motion, then it must be caused to be in motion by something outside of itself. (3) There can be no infinite chain of movers/movees.
(4) So there is a first, unmoved mover.
(5) Therefore, God exists.
Aquinas' Fifth Argument, From Design
(1) Among objects that act for an end, some have minds, whereas others do not. (2) An object that acts for an end, but does not itself have a mind, must have been created by a being that has a mind. (3) So there exists a being with a mind who designed all mindless objects that act for an end. (4) Hence, God exists.
Aquinas' Second Argument, Causality
(1) Some events cause other events.
(2) If an event happens, then it must be caused by something outside of itself. (3) There can be no infinite cause/effect chains.
(4) So, there is a first, uncaused cause.
(5) Therefore God exists.
Life forms were created in approximately their current state, recently and nearly simultaneously. But since the entrance of sin, degeneration and decay have appeared, and the law of love and cooperation has been to some extent replaced by the law of hatred and competition. We can assume that organisms were originally created to be best adapted to fulfill their place in existence, which does not mean that they were created to be reproducing machines or fitness machines. As for why the particular organisms were created that were created, the principle of unity and variety, theme and variations, seems to be present. Many body plans are illustrated and many ecological niches are filled. We have soft animals, animals with shells, animals with bones on the inside, moving animals, stationary animals, air animals, animals in the trees, animals on land, animals in the soil, animals in the sea, animals of various sizes, and so on. It is even possible that the Lord did not create all the animals from scratch, but may have taken parts of one animal to create the next one. As...