通过为这些国家提供一个框架定期会晤讨论气候变化等全球问题，G-20，作为一个自我选择的成员组成的俱乐部，可以赢得合法性。
By providing a framework for these countries to meet regularly to discuss global challenges like climate change, the G-20 – which is, at best, a club of self-selected members – gains legitimacy.