In order to fully enter into the establishment of the meaning of the term theism it is necessary, first, to be able to know what its etymological origin is. In that case, we can say that it is a word that derives from Greek, because it is the result of the sum of two components of that language:
-The noun "theos", which can be translated as "God."
-The suffix "-ism", which is equivalent to "doctrine" or "thought."

Hence it can be defined as the "doctrine that believes in God."
It is called theism to the recognition of the existence of a God that created the universe and is still involved in its conservation. The concept can also be linked to the fact believe in divine beings .
The idea of theism arose in the Ancient Greece with reference to the belief in the divinities that were part of the Olympus . With the weather different theisms began to be recognized according to the qualities attributed to the gods.
Throughout history there has been much talk about theism by important and recognized figures. This would be the case, for example, of the famous Frenchman Voltaire who did not hesitate to expose that theists think and believe in the existence of a God who is not only the creator of everything and everyone but has a power that is infinite. He also determined that those people who believe in theism establish that it was that God who shaped them, set them free and gave them the instinct.
He monotheism , for example, sustains the existence of a single god. He Catholicism , he Judaism and the Islam They are monotheistic religions. He polytheism , on the other hand, it is based on the belief in several gods, as it happens in the Hinduism . In all these theisms, it is accepted that the god or the gods have created the universe and continue to be involved in it, although transcending it.
In the same way, we cannot forget the existence of what is called henoteism. Under this term reference is made to the belief that there are several different gods but then there is one that is supreme to all.
He deism , on the other hand, recognizes the divine participation in the creation of universe , although it discards the subsequent supernatural intervention. For him pandeism In fact, God and the universe are one thing (that's why there is no "intervention").
Many have been the important deists who have existed throughout history. This would be the chaos, for example, of the inventor Benjamin Franklin, of Montesquieu, of Rousseau or even of the president of the United States George Washington.
The concept of theism also gives rise to the opposite notion: non-theism . These positions do not believe in the existence of a creative and absolute god. He buddhism It is a non-theistic religion: it is based on the teachings of Gautama Buddha , a human being who lived about five hundred years before Christ .
In the field of non-theism we can mention the atheism (they don't believe in any kind of god) and at agnosticism (which states that the existence of the gods cannot be sustained, although it does not deny or discard it).