"In addition to whatever assets life has nurtured in me, I have a disproportionate amount of money to share," MacKenzie Scott writes in her Giving Pledge letter.
"My approach to philanthropy will continue to be thoughtful.
It will take time and effort and care.
But I won't wait.
And I will keep at it until the safe is empty."
Scott, the former wife of Amazon's Jeff Bezos, is among the world's richest people who have pledged to give away most of their money.
The Guardian has the full letter.
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The 1st annual 2013 Social Entrepreneurship Conference was a collaboration between the Maricopa Small Business Development Center, SEED SPOT, Wells Fargo, the SBA, and the Maricopa Community Colleges.