Describe briefly st. thomas aquinas' argument from contengency necessity. What fault might it have?

The “Argument from Contingency” examines how every being must be either necessary or contingent. Since not every being can be contingent, it follow that there must be a necessary being upon which all things depend.

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration