Uhhhh. Sure it is. We stopped nuclear weapons development. At best, rogue countries can catch up to where we are but there's no political will to build even bigger or more powerful bombs anymore. Thats an entire branch of science that we've literally cut off on a worldwide basis.
Science is, and must, be controlled to stay within the realm of useful to the people. The minute it is no longer serving us is the minute we should work on getting rid of it. Fortunately, science isn't a cohesive bathtub where everything must be thrown away with the baby. We can (and do) pick-and-choose what to develop.