Comment by nearbuy

I think it's the opposite. Bill credited his parents for his philanthropic drive and Warren buffet as the person who first introduced him to the idea of giving everything away. He's been active and knowledgeable in his philanthropy and posts frequently about global health, poverty, aid, etc.

Melinda also, of course, did work for their joint foundation before she left. Since leaving, she shifted her philanthropic focus more to US women's health and reproductive rights.

Bill has committed to giving away nearly all his wealth (99%) over the next 19 years. Melinda is still committed to giving away over 50% of her wealth over her lifetime.

I don't see any evidence that Melinda was the primary driver for Bill's philanthropy.