Most people’s incomes grow much slower than bacteria, unfortunately. Still, even if your income increases by only 2 percent a year, after 35 years it will have doubled. And then, if you maintain 2 percent growth, in another 35 years it will have doubled again. Over 200 years—if you lived that long—it would double six times, which is exactly what we saw in Sweden’s bubble trail in the last chapter, and which is typically the slow and steady way countries have moved from Level 1 to Level 4.

