"How to End the Slavery Blame-Game"
It is NEVER going to "end".
So long as there is one race that cannot achieve what another race has achieved, the former will blame the latter for its failures.
The issue of slavery will be used to stoke the fires of blame and hatred, but that really isn't the core of "the problem".
The problem is one of genetics.
Until that can be overcome, it will remain a problem that cannot be solved.