Shalom aleichem Rabbi Lauffer. Thank you for answering my last question. Sanhedrin 37a says that Adam was created alone so that one would not be able to tell his fellow that his father was greater than his father. But how can this be the reason, when Kayin's father was Satan in the guise of the nachash, not Adam HaRishon, as brought in Pirkei d' R' Eliezer 21? So we see that some people descended from the serpent, and not everyone descended from Adam HaRishon. Is the answer that Hashem knew that all of the b'nei Kayin would die in the flood, so He knew beforehand that Adam would be the father of everyone? But that doesn't explain the fact that before the flood, the b'nei Adam could have told the b'nei Kayin that their father was better than their father.