[For more, see NewsBusters.] MSNBC's Cycle hosts on Thursday brought on liberal author Rick Perlstein to pine for the greatness that was the 1970s. Perlstein appeared to promote his new book on the '70s and the transition from Richard Nixon to Ronald Reagan. Allowing that the decade was a "dark time," the writer enthused, "But to me, there's some nostalgia to that period. Because Americans proved they could look our problems in the eye like grownups and face them." Remember, this was the decade of Vietnam, gas shortages, American hostages in Iran and inflation, to name a few problems.