History is dangerous. For lying in the past are unresolved grudges, slights, injustices, actions judged by today's standards as wrong and errors. These are not safely tucked away in the past, that once a day has passed all the bad and evil is locked in time and unable to harm the present. Nope. It gets resurrected like a zombie, and it's coming to get you.
I was thinking of the grudges and the idea that group A 'owes' group B something because the first group stole, hoodwinked, or wronged the second. And an apology or replacement in kind just wont cut it because went you add interest, subtract previous attempts at getting even, and factor in lost opportunities it never settles it. The only thing that settles the debt is forgiveness. Well that or wiping out one group.