That Used to be Us: How America Fell Behind in the World It Invented and How We Can Come Back is a non-fiction book written by Thomas Friedman, a Pulitzer Prize-winning New York Times columnist and author, with Michael Mandelbaum, a writer and foreign policy professor at Johns Hopkins University.
That Used to be Us: How America Fell Behind in the World It Invented and How We Can Come Back adalah buku nonfiksi karya Thomas Friedman, kolumnis dan penulis New York Times pemenang Hadiah Pulitzer, dan Michael Mandelbaum, penulis dan dosen kebijakan laur negeri di Universitas Johns Hopkins.