Out: Plans, experts and above all, leaders. In: Adapt - improvise rather than plan; fail, learn, and try again; figure things out on the front line. Tim Harford shows how the world’s most complex and important problems - including terrorism, climate change, poverty, innovation, and the financial crisis - can only be solved by rapid experimenting and adapting. From a spaceport in the Mojave Desert to the street battles of Iraq, from a blazing offshore drilling rig to everyday decisions in our business and personal lives, this is a handbook for surviving - and prospering - in our complex and ever-shifting world.