Studying the evolution of the persian-Arabic alphabet from the Manichaean alphabet

One of the most important issues that has always been discussed is the adaptation of the Persian alphabet from the Arabic alphabet. Generally, it is common among the public that the root of our current alphabet is derived from the Arabic alphabet. This issue has been so much talked about throughout history that it has inadvertently become an inescapable truth. But linguistic studies show the opposite of this. In this article, relying on two groups of historical documents and linguistic documents, we will analyze the fact that our alphabet today, contrary to popular belief, is not a bare alphabet, which is derived from the scripts of the Sassanid period. In this regard, after researching how the so-called Arabic alphabet was formed, an attempt has been made to prove this issue by examining the letters of the alphabet in the three Manichaean, Pahlavi, and Avestan scripts, and comparing them with the Persian alphabet.