World Leaders with a PhD: 🇨🇳 Xi Jinping – PhD in Law 🇷🇺 Vladimir Putin – PhD in Economics 🇮🇳 Manmohan Singh – PhD in Economics 🇵🇱 Karol Nawrocki – PhD in History 🇳🇬 Goodluck Jonathan – PhD in Zoology 🇩🇪 Angela Merkel – PhD in Quantum Chemistry 🇵🇪 Pedro Pablo Kuczynski – PhD in Economics 🇪🇸 Pedro Sánchez – PhD in Economics 🇮🇩 Susilo Bambang Yudhoyono – PhD in Agricultural Economics 🇮🇷 Hassan Rouhani – PhD in Constitutional Law 🇮🇹 Mario Draghi – PhD in Economics 🇬🇷 Lucas Papademos – PhD in Economics 🇲🇽 Ernesto Zedillo – PhD in Economics 🇨🇱 Ricardo Lagos – PhD in Economics 🇯🇵 Yukio Hatoyama – PhD in Engineering 🇪🇬 Boutros Boutros-Ghali – PhD in International Law 🇦🇹 Bruno Kreisky – PhD in Law Note: Leaders from the past and present.