After almost a year in office, President Trump has yet to name a science adviser and director of the White House Office of Science and Technology Policy. Since World War II, no American president has shown greater disdain for science — or more lack of awareness of its likely costs.

The O.S.T.P. was authorized by Congress in May 1976 to give the president “independent, expert judgment and assistance on policy matters which require accurate assessments of the complex scientific and technological features involved.” It has played an important role in coordinating national science and technology activities and policies among federal agencies.

The director of the office, who is nominated by the president and requires Senate approval, typically serves as the president’s science adviser, providing him with confidential, unbiased counsel. Much of what the federal government does and the many policy changes the president and his appointees are now making or hope to make have scientific and technological underpinnings.

The science adviser is the one individual who can quickly pull all the relevant information together for the president, cut through conflicting advice coming from other senior advisers and Cabinet secretaries, and get evidence-based options in front of him. Especially important has been the adviser’s role in helping the president deal with crises — Sept. 11, the subsequent anthrax attacks, the Fukushima nuclear nightmare in 2011, the Ebola and Zika outbreaks, hurricane devastation and cyberattacks.