Here is a very good video that shows how the modern economy offers more diversity and more "wealth" due to exchange and specialization.
Some will call it simplistic, but the idea is correct. Because of the power of specialization and the division of labor that is possible with the modern marketplace, we have more choice and most of us enjoy better living standards than the wealthy of even a century ago. And, a great many people are involved in making those standards possible. And those same people benefit by providing us our wants and needs through the exchanges we make for their goods and services.