In her five years as prime minister of New Zealand, Jacinda Arden has become a global icon for left-leaning politics and women in leadership, even as she struggled at home with the economy and Covid-19 restrictions. The 41-year-old, who gained attention for bringing her baby to a United Nations meeting and wearing a hijab after a massacre targeting Muslims, has announced that she will step down in less than three weeks, saying she had "no more in the tank". Her tenure was eventful, but her empathetic leadership and crisis management skills often masked her government's shortcomings. Considered personable and engaging,...