Each year the World Economic Forum undertakes an ambitious mission – to scour the world to select 100 young leaders, under the age of 40, who are tackling the world’s most complex challenges with innovative approaches. Not only are women in the majority in this year’s class, but half the intake come from emerging economies, reflecting a trend towards greater diversity in global leadership. Four game-changing women entrepreneurs and socialpreneurs from sub-Saharan Africa make this year’s list.