21. Did mankind need a Saviour?
Yes . The fall of Adam and Eve resulted in the human race falling into the bondage of sin from which we could not save ourselves.
Romans 3:23
23. For all have sinned, and come short of the glory of God;
Isaiah 64:6
6. But we are all as an unclean thing, and all our righteousness are as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.