Best Pro-Father Org. for bequest

If you were going to kick the bucket and wanted to leave a sum of money for
an organization that would help fathers be with their children after
the mother takes off with the kids and makes visitation difficult,
which organization would you donate to?

I'm aware of some "father's rights" organizations but in your opinion,
what organization would provide the most benefit in helping fathers
become part of their children's lives given that they wish to be?

I've spent much time and money obtaining a court order to simply be able
to be a good father so our child and would be interested in knowing
of an exceptional organization that could affect changes in laws to
allow uniform custody (when wanted) between mothers and fathers.

b.