Jul 18, 2010-- Billionaire Paul Allen has taken his friend Bill Gates up on his challenge to publicly pledge the majority of his wealth to philanthropy. In honor of the 20th anniversary of his Paul G. Allen Family Foundation, which has given 3,000 grants to various nonprofits, Allan plans to leave the majority of his $13 billion estate to philanthropy to continue the work of his foundation and fund scientific research. Making certain that his philanthropic efforts "will continue after my lifetime," he states, "As our philanthropy continues in the years ahead, we will look for new opportunities to make a difference in the lives of future generations." (671 reads)