Who is the author of original sin?

There is no single "author" of the concept of original sin. It is a theological doctrine which has developed and evolved over time within various religious traditions. Depending on the specific tradition or context you are interested in, different sources or individuals may be associated with the development of the concept.

In Christianity, the idea of original sin traces its roots to early Christian theologians and church fathers, influenced by the teachings of the Hebrew Bible and New Testament. Augustine of Hippo (354-430 AD), often considered one of the most influential theologians in Western Christianity, played a significant role in shaping the doctrine of original sin. He posited that humanity inherited a state of sin and corruption due to the disobedience of the first man and woman, Adam and Eve, in the Garden of Eden.

In Judaism, the concept of Adam's sin or the "sin of the tree" is also mentioned in texts like the Torah, but its interpretation, significance, and implications differ from the Christian understanding of original sin.

It's important to note that different religious traditions, sects, and denominations within Christianity and Judaism may have differing perspectives on the nature, significance, and consequences of original sin.