I'm aware of only three ways that power goes from being concentrated to being shared or transferred:
1) death or other inability to wield power among those who hold it,
2) revolution,
3) those in power decide to share it.
I'm not a big fan or 1) or 2). However, if you have other options, I'm all ears.
No other option is needed. I truly believe that far more white people are accepting, and in some cases even eager, for option 3 than you give them credit for. I do not see "sharing", as you put it, as removing any power from me.