I clicked on the link and looked at all the organizations Buffett donated to (2013) but really, there aren’t too many that I think writing a letter to would have any effect at all. Most are left wing front groups, universities (I repeat myself), professional organizations, etc. Read it yourself. While interesting, it’s also discouraging. “Many there be oh, Lord, that rise up against me...” comes to mind. For this level of evil we need divine power.