Jordy writes: What do you think of the book, The Simple Path to Wealth? Do you think it's a good approach on investing in the current days? I refer to the Stone Age of Investing as things going back before about 1970. In the 70s, 80s, and 90s were what we call the Bronze Age Of Investing. And that is the period from the late 1990s to the mid-20s,. led by Jack Bogle and Van Gard.