World

by Garry Kasparov

by TIME Photo

by Diane Tsai

by Mark Thompson

by Aleksandra Gjorgievska

by Charlotte McDonald-Gibson

by TIME Staff

by Ilene Prusher

by Charly Wilder

by Nick Gillespie

by Vivienne Walt

by Abby Abrams

by Megan Gibson

by Hannah Goldberg

by Aryn Baker