Steven Johnson: We can be different from ourselves as we move from one situation in life to another. The real source of variation, not only across people, but within people is the strength of the impulse. "I'm very low on sloth for either physical or mental work," says Johnson. But when I look at my own scores, I'm pretty darn impulsive when it comes to wrath that itself varies across domains"
Why are people so inconsistent? Is there such a thing as character? And did Stephen once have the world's longest chain of gum wrappers?