WASHINGTON -- The story mocks a cliche: As they were leaving the Garden of Eden, Adam said to Eve, "Darling, we live in an age of transition." The first sentence of Barack Obama's letter introducing his new strategic review says Americans have often coped with "moments of transition" such as today's "time of sweeping change." Such boilerplate makes one weep -- and yearn for serious, meaning unsentimental, assessments of America's foreign policy tradition.