Teaology 26
Westminster Confession of Faith
Chapter VI Of the Fall of Man, of Sin, and the Punishment thereof
III. They being the root of all mankind, the guilt of this sin was imputed; and the same death in sin, and corrupted nature, conveyed to all their posterity descending from them by ordinary generation.
Westminster Larger Catechism
Q. 22. Did all mankind fall in that first transgression?
A. The covenant being made with Adam as a public person, not for himself only, but for his posterity, all mankind descending from him by ordinary generation, sinned in him, and fell with him in that first transgression.