Sforno on Genesis 5:1/ספורנו על בראשית ה׳:א׳

1זה ספר תולדות אדם, thus begins the story of human history, and events worth recording for all posterity.

2 בדמות אלוקים עשה אותו, a reference to man’s free will. It is in this respect that man is like G’d. This is why when different generations of man angered G’d they were punished, [i.e. they had not been programmed to do evil. Ed.]