Doomsday scenarios: take your pick

"As scientists, we understand the dangers of nuclear weapons and their devastating effects, and we are learning how human activities and technologies are affecting climate systems in ways that may forever change life on Earth. As citizens of the world, we have a duty to alert the public to the unnecessary risks that we live with every day, and to the perils we foresee if governments and societies do not take action now to render nuclear weapons obsolete and to prevent further climate change."
Stephen Hawking

"The clear fact is that Israel will never find peace until it is willing to withdraw from its neighboring occupied territories and permit the Palestinians to exercise their basic human and political rights. With land swaps, this "green line" can be modified through negotiations to let a substantial number of Israeli settlers remain in their subsidized homes east of the internationally recognized border. The premise of exchanging Arab territory for peace has been acceptable for several decades to a majority of Israelis but not to a minority of the more conservative leaders, who are unfortunately supported by most of the vocal American Jewish community."
Jimmy Carter