“I’m not leaving because it’s hard… I’m leaving because with such a privileged job comes responsibility — the responsibility to know when you are the right person to lead and also, when you are not.” When Jacinda Ardern announced she would be resigning from her post as prime minister of New Zealand close to 10 months before her term was to end in October, it evoked a collective gasp of astonishment. To a world more inured to the sight of