The first half of 2019 offers unique social, political and economic challenges to navigate. You might think you know what's coming, but for better or worse, you will be lucky to be even partly right in your predictions. How agile are you and your team? Do you have the flexibility to adapt to rapidly changing conditions? What will it take to succeed this year? A spirit of adventure in the face of ambiguity might serve you well. Get ready to dig deeper than you think you might have to.