Many groups and the religions they invented have adhered to the idea of a single creator. My personal belief is in a single, exclusive creator from which the universe and all within has (and is still being) evolved.
My personal preference for naming that creator is to speak of him/her/it as Tao. I choose this reference to the Creator specifically because the Taoists are so adamant that any man who thinks he understands the Tao fully or can speak of the Tao with abolute authority is in error. I choose Tao because of its non exclusivity.
For those of us who adhere to the idea of a Primal Cause, by definition there can be only one. Therefore, logic demands the admission that the Great Spirit of the native americans, the Tao, God of the bible, Allah of the Muslims .... ad infinitum.... are all refering to the same entity.
So.......... for those of us who are monotheists, logic demands the admission that we all believe in the same god. We all believe in the Creator.... there can be only one.
The sad thing is that, through the ages, groups of men (and/or women), for reasons known only to themselves, have devised copious texts purporting to claim The Creator for only their select group.