Answer:
John G. Roberts, Jr., Chief Justice of the United States
Clarence Thomas, Associate Justice
Stephen G. Breyer, Associate Justice
Sonia Sotomayor, Associate Justice
Such groups include hunter-gatherers, pastoral nomads (owning livestock), and tinkers or trader nomads. In the twentieth century, population of nomadic pastoral tribes slowly decreased, reaching to an estimated 30–40 million nomads in the world as of 1995.