The choice of South African jurist Navanethem “Navi” Pillay for this year’s Nobel Peace Prize was a striking show of support for the rules-based multilateral system. It was also a slap in the face to US President Donald Trump, who has shamelessly lobbied for the prize while attacking the international legal order. At a political rally shortly after the announcement, Trump dismissed Pillay as “a liberal person who works at the United Nations, who nobody has ever heard of”.The Nobel committee was clear in its message, noting that Pillay’s “independence, expertise and steadfastness have made her one of the most...