Israeli Ambassador Ron Prosor, right, at the UN in 2012 (Chip East / Reuters) ASPEN, Colo.—The UN Charter turned 70 years old last Friday. But if you ask Ron Prosor, Israel’s ambassador to the UN, the United Nations itself isn’t aging very well. “After the Second World War, it was a great body,” Prosor told the audience at an Aspen Ideas Festival panel.