MOSCOW/KIEV, July 16 (Xinhua) -- Russia on Tuesday rejected U.S. President Donald Trump's 50-day ultimatum to agree to an Ukraine ceasefire, dismissing the threat of "severe tariffs" as unacceptable.

Our Forward Thinkers list recognizes and spotlights intellectual innovators poised to shape international debates in the years ahead. It brings together 30 influential individuals from academia, ...