“What is ‘the cheapest, most nutritious and bountiful food that has ever existed in human history’? Hint: It has 390 calories. It contains 23g, or half a daily serving, of protein, plus 7% of daily fiber, 20% of daily calcium and so on. Also, you can get it in 14,000 locations in the US and it usually costs $1. Presenting one of the unsung wonders of modern life, the McDonald’s McDouble cheeseburger. The argument above was made by a commenter on the Freakonomics blog run by economics writer Stephen Dubner and professor Steven Leavitt, who co-wrote the million-selling books on the hidden side of everything.”
