Leadership: Our new science czar, John Holdren, once backed compulsory sterilization and forced abortion as part of a government population-control program. The only thing missing was a Soylent Green recipe.In April, President Obama declared that "the days of science taking a back seat to ideology are over." In everything from stem cell research to climate change and energy policy, reason and science would triumph. The problem is that what the Obama administration considers science, as exemplified by the choice of Holdren, is troubling. In a recently rediscovered 1977 book, "Ecoscience: Population, Resources, Environment," co-authored with doomsters Paul and Anne Ehrlich,...