The new year always presents a twofold opportunity: to reflect on the past and then draw from those insights to shape our future. Every January, the Review’s tapped into this duality to make a tradition out of both looking back and gazing ahead. In what is somehow the seventh installment of our annual retrospective, we’re revisiting the thoughtful individuals and bold ideas that shaped company-building in 2019. (If you’re curious to see how this collection has evolved over time, check out previous editions from 2018, 2017, 2016, 2015, 2014 and 2013.)