Who Is The Greatest Leader In World History?

Courage, tolerance, ruthlessness: which factors define an inspiring, effective figurehead? BBC World Histories Magazine asked historians including Rana Mitter, Margaret MacMillan and Gus Casely-Hayford to nominate the greatest leader – someone who exercised power and had a positive impact on humanity – and to explore their achievements and legacy. So who has topped the poll?

Visualized: The World Leaders In Positions of Power (1970-Today)

10 Greatest Ancient Military Leaders

8 leadership lessons from history

What Do Great Leaders Have in Common?

Leadership Legacies: 10 of History's Greatest Leaders