Thomas Aquinas was a mediaeval Theologian who helped develop Apologetics.
. His arguments aren't as strong as supporters imagine.
Thomas Aquinas (1225-1274 AD) wrote a specific series of works in Summa Theologica where he attempted to use logic alone to prove the existence of god. He came up with five arguments, or 'ways', that he felt could logically lead to that one conclusion. Of course, like all god claims, there is no evidence to support the claims, and his arguments have all been thoroughly debunked as containing serious logical flaws and presuppositions.