1900-1909: Roosevelt vs. Morgan -- 1910-1919: world unity, world war -- 1920-1929: prosperity-then ruin -- 1930-1939: battling the Great Depression -- 1940-1949: from devastation to innovation -- 1950-1959: what's good for General Motors -- 1960-1969: a long boom -- 1970-1979: doubts and deregulation -- 1980-1989: the great turnaround -- 1990-1999: the American decade.