For those who weren???t around the early 1970s, the phrase ???Zero Population Growth??? quickly swept the-then still very much mass media, once Paul Ehrlich???s doomsday eco-crankery, The Population Bomb was published in 1968, and Ehrlich began appearing on shows such as the Today Show and Johnny Carson???s Tonight Show. (Then and now, you can count on NBC for plenty of left-wing doooooom), and Wa