The book approaches world history by describing the way in which people over the centuries acquired wealth by chronologically looking at 10 wealthy people. Early on, wealth was acquired by taking what others had. Acquisition methods progressed to acting as a middleman, to being one who could exact taxes and tributes, to using money to create more money through investment, to manufacturing things, to manipulating stocks, to taking a tiny piece of billions of digital transactions. There were ridiculously wealthy people in here I had not heard of, including Mansa Musa, Jacob Fugger, Richard Arkwright, and Hetty Green (the latter being the loan female in the group). Each was emblematic of the means of getting rich in their time. Does not speak well of the wealthy as a group!