 He said those common challenges included the goal of eliminating nuclear weapons (which he said might not occur in his lifetime), nuclear proliferation, climate change, tolerance "among people of different faiths and races and religions", peace between and security for Israelis and Palestinians, better social conditions for the world's poor, including "the ability to get an education and make a decent living; the security that you won't have to live in fear of disease or violence without hope for the future.