Since turning 30, I’ve found myself on the opposite side of many of the same arguments I had in my 20s. Here are four of those shifts. — T his past month, I went back and reread the book Debt: The First 5,000 Years by David Graeber. The first time I read the book was back in 2013 and, ever since, I’ve largely considered it one of my favorite books on economics, the history of finance, and political…