The duty of assistance is an important element of Rawls' philosophy of international law ,though questioned by many scholars . However ,Rawls' duty of assistance is very compelling .There does not exist a global structure in the global community ,which makes it im-possible to apply different principle .Moreover ,in diversified society of peoples ,the duty of assistance is expected to reach the core of over-lapping consensus of peoples .%援助义务是罗尔斯国际法哲学的重要内容 ,受到不少学者的质疑与否定.然而 ,罗尔斯的援助义务具有很强的说服力.国际社会并不存在一种全球的基本结构 ,使得差别原则不可能应用于其中.在多元的万民社会中 ,援助义务与差别原则相比更有望达成各"人民"重叠共识的核心.
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