In late September, Justin Trudeau addressed the One Young World gathering, specifically held in Ottawa the better to bask in the glow of the Canadian premier lauded by his own foreign minister as “the most prominent and popular political figure on the planet”. The conference for some 1,300 young leaders exposed them to the wisdom of such luminaries as the former UN secretary-general Kofi Annan, former Irish president Mary Robinson and the formerly celebrated Cher, singer and actress. Trudeau let the past tend to itself while he met one-on-one with the British actress Emma Watson of Harry Potter fame.