What's a war without its leaders? In this week's Worldview, Adam Boulton speaks to leading historians Margaret MacMillan and Andrew Roberts on how leadership shapes both conflicts and their resolutions.

Image description: Ukrainian President Volodymyr Zelenskyy, stands for a moment of silence during a ceremony to award medals to service members to celebrate the Day of Defenders of Ukraine in the courtyard of the Mariinskyi Palace, October 14, 2022 in Kyiv, Ukraine. Credit: Ukraine Presidents Office / Alamy Stock Photo.