@Fil Albuquerque,
The vast majority of people thinks that reason is a phenomenal category of the mind...but reason only means ratio, order...reason is abstract.
Reason means the world has the regularities it has and how they work, such n such...there is no why, there is only IT IS ! There is no alternative to everything...whatever exists it wasn't commanded by anyone, it was always here in space/time...the Laws of nature command nothing rather they are the very real in its eternal unsurpassed manifestation...determinism could be better justified with simple timeless perfect correlation of a given ratio between events...that which is forever the case.