The National Academies of Sciences, Engineering, and Medicine (NASEM), also known as the National Academies, is a congressionally chartered organization that serves as the collective scientific national academy of the United States. The name is used interchangeably in two senses: (1) as an umbrella term or parent organization for its three subdivisions that operate as quasi-independent honorific learned society member organizations known as the National Academy of Sciences (NAS), the National Academy of Engineering (NAE), and the National Academy of Medicine (NAM); and (2) as the brand for studies and reports issued by the unified operating arm of the three academies originally known as the National Research Council (NRC). The National Academies also serve as public policy advisors, research institutes, think tanks, and public administration consultants on issues of public importance or on request by the government.
The National Research Council, National Academy of Engineering, and National Academy of Medicine began as activities of the National Academy of Sciences until they were reorganized in 2015 into units of the current National Academies while maintaining the charter status and corporate successorship of the original National Academy of Sciences.
Now jointly governed by all three academies, the NRC produces some 200 publications annually which are published by the National Academies Press. The reports produced by the National Academies have been characterized as reflective of scientific consensus.
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History
The US National Academy of Sciences was created by an Act of Incorporation dated March 3, 1863, which was signed by then president of the United States, Abraham Lincoln. The Act stated that "... the Academy shall, whenever called upon by any department of the Government, investigate, examine, experiment, and report upon any subject of science or art. ... " With the American civil war raging, the new academy was presented with few problems to solve, but it did address matters of "... coinage, weights and measures, iron ship hulls, and the purity of whiskey ..."
All subsequently affiliated organizations have been created under this same overall congressional charter, including the two younger academies, National Academy of Engineering (NAE) (created in 1964) and NAM (created as the Institute of Medicine in 1970 and rechartered as NAM in 2015).
Under this same charter, the National Research Council was created in 1916. On June 19 of that year, then US president Woodrow Wilson requested that the National Academy of Sciences organize a "National Research Council". The purpose of the council (at first called the National Research Foundation) was in part to foster and encourage "the increased use of scientific research in the development of American industries ... the employment of scientific methods in strengthening the national defense ... and such other applications of science as will promote the national security and welfare."
At the time, the academy's effort to support national defense readiness, the Committee on Nitric Acid Supply, was approved by Secretary of War Newton D. Baker. Nitric acid was the substance basic in the making of propellants such as cordite, high explosives, dyes, fertilizers, and other products but availability was limited due to World War I. The NRC, through its committee, recommended importing Chilean saltpeter and the construction of four new ordnance plants. These recommendations were accepted by the War Department in June 1917, although the plants were not completed prior to the end of the war.
In 1918, Wilson formalized the NRC's existence under Executive Order 2859. Wilson's order declared the function of the NRC to be in general:
"(T)o stimulate research in the mathematical. physical, and biological sciences. and in the application of these sciences to engineering, agriculture. medicine. and other useful arts. with the object of increasing knowledge, of strengthening the national defense, and of contributing in other ways to the public welfare."
The academies
The National Academy of Sciences, National Academy of Engineering, and National Academy of Medicine are honorary membership organizations, each of which has its own governing Council, and each of which elects its own new members. The membership
of the three academies totals more than 6,300 scientists, engineers, and health professionals. New members for each organization are elected annually by existing members, based on their distinguished and continuing achievements in original research. By the terms of the original 1863 Congressional charter, the three academies serve pro bono as "advisers to the nation on science, engineering, and medicine."
Program centers
The program centers, formerly known as the National Research Council, are collectively the operating arm of the three academies for the purpose of providing objective policy advice. Although separately chartered (see above), it falls legally under the overall charter of the National Academy of Sciences, whose ultimate fiduciary body is the NAS Council. In actual practice, the NAS Council delegates governing authority to a Governing Board of the National Research Council that is chaired jointly by the presidents of the three academies, with additional members chosen by them or specified in the charters of the academies.
Under this three-academy umbrella, the program units produce reports that shape policies, inform public opinion, and advance the pursuit of science, engineering, and medicine.
There are five major program centers: Center for Advancing Science and Technology (CAST); Center for Health, People, and Places (CHPP); the Gulf Research Program; Transportation Research Board, and the Office of International Networks, Cooperation, and Security (INCS).
Center for Advancing Science and Technology (CAST)
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Computing Research, Technologies, and Systems
Science and Engineering Education and Workforce
Science and Technology Policy and Law
Physical Sciences, Systems, and Infrastructure
Aeronautics, Space, and Astronomy
Center for Health, People, and Places (CHPP)
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Biomedical and Health Sciences Program Area
Earth Systems and Resources Program Area
Food, Nutrition, and Agriculture Program Area
Health Care and Public Health Program Area
Life Sciences and Biotechnology Program Area
Social and Economic Systems Program Area
Gulf Research Program (GRP)
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Gulf Environmental Protection and Stewardship (GEPS)
Board on Gulf Education and Engagement (BGEE)
Gulf Health and Resilience Board (GHRB)
Gulf Offshore Energy Safety Board
Transportation Research Board (TRB)
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Consensus and Advisory Studies Division
Cooperative Research Programs Division
Airport Cooperative Research Program (ACRP)
National Cooperative Highway Research Program (NCHRP)
Behavioral Traffic Safety Cooperative Research Program (BTSCRP)
National Cooperative Research and Evaluation Program (NCREP)
Transit Cooperative Research Program (TCRP)
National Cooperative Freight Research Program (NCFRP)
National Cooperative Rail Research Program (NCRRP)
Hazardous Materials Cooperative Research Program (HMCRP)
International Networks, Cooperation, and Security (INCS)
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Study process
The National Academies attempt to obtain authoritative, objective, and scientifically balanced answers to difficult questions of national importance. Top scientists, engineers, health professionals, and other experts (not limited to those in academies membership) are enlisted to address the scientific and technical aspects of some of society's problems. These experts are volunteers who serve on study committees that are convened to answer specific sets of questions. All committee members serve without pay.
NASEM does not perform original research; rather it provides independent advice. Federal agencies are the primary financial sponsors of the Academies' work; additional studies are funded by state agencies, foundations, other private sponsors, and the National Academies endowment. The external sponsors have no control over the conduct or results of a study, once the statement of task and budget are finalized. Study committees gather information from many sources in public meetings but deliberate in private in order to avoid political, special interest, and sponsor influence.
All reports go through an extensive external review facilitated by the internal Report Review Committee (also consisting of members from the NAS, NAE, and NAM).
Through this study process, the National Academies produce around 200 reports each year. Recent reports addressed the obesity epidemic, the use of forensics in the courtroom, invasive plants, pollinator collapse, underage drinking, the Hubble Space Telescope, vaccine safety, the hydrogen economy, transportation safety, climate change, and homeland security. Many reports influence policy decisions; some are instrumental in enabling new research programs; others provide independent program reviews. The National Academies Press is the publisher for the National Academies of Sciences, Engineering, and Medicine, and makes its publications available for free online reading. The full book PDFs have been available for free download since 2011.
The National Academies also provide credentialed witnesses who speak before government bodies on important issues. For example, a committee chair may speak on rising mortality rates in working adults in the US to a Senate Subcommittee on Primary Health and Retirement Security, Committee on Health, Education, Labor and Pensions.
Reports
In 2025, the National Academies issued their consensus study report Review of Evidence on Alcohol and Health to inform the 2025–2030 Dietary Guidelines for Americans. The committee conducted systematic reviews of scientific literature published to evaluate the relationship between alcohol consumption, including moderate alcohol consumption (defined as one drink per day for women and two for men), and eight specific health outcomes. To attempt to ensure the accuracy of these reviews, the report specifically attempted to account for "abstainer" and "sick quitter" biases by excluding studies that grouped former drinkers who may have quit due to health issues with lifelong non-drinkers.
The committee's findings varied in certainty across different health categories. It concluded with moderate certainty that moderate alcohol consumption is associated with lower all-cause mortality and a lower risk of cardiovascular mortality compared to never consuming alcohol. Conversely, the report found with moderate certainty that moderate intake is associated with an increased risk of breast cancer in females. For other conditions, such as colorectal cancer and nonfatal heart attacks, the evidence reached only a "low" level of certainty. In several areas, including neurocognition and weight change, the committee determined that no definitive conclusions could be drawn due to inconsistent data and the lack of standardized reporting in alcohol research.
In 2001, the NRC published the report Climate Change Science: An Analysis of Some Key Questions, which emphasized that national policy decisions made both in the near term and in the future will influence the extent of any damage suffered by vulnerable human populations and ecosystems later in this century. The report endorsed findings of the Intergovernmental Panel on Climate Change (IPCC) as representing the views of the scientific community:
The changes observed over the last several decades are likely mostly due to human activities, but we cannot rule out that some significant part of these changes is also a reflection of natural variability. Human-induced warming and associated sea level rise are expected to continue through the 21st century ... The IPCC's conclusion that most of the observed warming of the last 50 years is likely to have been due to the increase in greenhouse gas concentrations accurately reflects the current[2001] thinking of the scientific community on this issue.
Other programs
The Christine Mirzayan Science and Technology Policy Fellowship is an annual program for recent graduate students to spend three months working in the National Academies. The Academies also administered the Marian Koshland Science Museum in downtown Washington until its closing in 2017; the Museum has since been replaced by LabX, a program of online resources and nationwide public events that aim to increase awareness of scientific and evidence-based solutions to community problems.
Revenue
The National Academies do not receive direct appropriations from the federal government; instead their revenue comes from grants and contracts of federal agencies and private sources. According to the New York Times in 2023, "about 70 percent of the National Academies budget comes from federal funds, it also raised private donations from individuals, nonprofits and companies, including Chevron, Google, Merck, and Medtronic." At the time it was advising the government on opioid policy, it received $19 million from Purdue Pharma's Sackler family between 2000 and 2021.