Travis Kalanick founded Uber after getting into an argument with a taxi driver in Mexico and jumping out of the moving cab, leaving him with a dislike for traditional taxis. Under his leadership as CEO, Uber grew exponentially from 3 drivers to over 3.9 million drivers within 7 years, becoming the highest valued private company in the world. However, Kalanick's extremely aggressive leadership style and culture at Uber led to protests and lawsuits. He ultimately resigned as CEO in 2017 amid investigations into Uber's culture and workplace.