The 20th century was arguably the strangest 100 years in human history, and the 21st century is shaping up to be even more unfathomably bizarre. Some pioneers of the future seem frightening and grotesque in their differentness when they show up, bringing news from the Frontier. But David Bowie was the gentlest, most decent sort of prophet, and he brought a special professionalism to his own freakishness that gave people courage. Every day of this century, we keep moving out beyond what we know, what makes us comfortable. Every cairn David Bowie left for us out there, I’ll consider a sign that we’re right where we should be.