Attacks on our federal environmental charter, the National Environmental Policy Act, or NEPA, have escalated from seeking the statute’s truncation to its outright abolition. Increasingly bandied about is the claim that while all well and good when passed in 1969, NEPA is now superfluous because we have a whole series of other laws protecting specific resource and places. This ill-founded contention misses what is unique about NEPA and why we benefit from it, today as much as ever.NEPA is our one, full-spectrum, nationwide mechanism for getting agencies to use their discretion better. Other, resource-specific,federal environmental laws are prohibitory, setting minimum protective standards as a floor under agency discretion. They provide a basic “thou shalt not” for individual resources and values. NEPA’s focus is on the positive, the field of possibilities, not what agencies have to avoid but rather on how to do best what they can do—over and above those often bare-bones minimums. As applied, if well and conscientiously implemented, NEPA equips and nudges agencies toward decisions that are smart, well-informed, and responsive. In so doing, it confers three critical benefits on the public.