Alastair Humphreys was once named a National Geographic Adventurer of the Year, and is a sought after inspirational speaker and a best-selling author. His expeditions are a call to arms: “Nothing,” he proclaims, “is achieved without someone being bold enough to begin it and taking that first step” – which needs only be a tiny one to “set us on the way to realizing that we are all capable of more than we imagine.”