At a recent industry event, I quipped that this is “the best of times and the worst of times” for retailers. Implicit in my comment — which was a paraphrase of the opening lines of A Tale of Two Cities, the Charles Dickens classic about the French Revolution — that the retail industry is undergoing a revolution of its own. Never mind the “retail apocalypse.” What retailers have begun to realize is that the demise of their businesses is not a foregone conclusion. This is a time for retailers to take action, not sit idly on the sidelines. In 2018, we saw more retailers take action by equipping themselves with the most important weapon for battle: customer strategy fueled by customer data science.