Einaudi joined the Government Department of Cornell University in 1945 and immediately set about changing the course of comparative political theory. Eventually, Einaudi became the Goldwin Smith Professor, chair of the Department of Government from 1951 to 1956 and again from 1959 to 1963, presiding over an expansion of the Department from 5 to 12 members. Three central tenets to Einaudi's work were: that the study of politics must be embedded in history; that Europe and the United States have much to teach each other about the practice of democratic politics; and that the classics of political theory must inform the study of contemporary democratic states. These themes were best embodied in his 1959 book, The Roosevelt Revolution. In 1960, Einaudi was asked to be the founding director of the Center for International Studies to initiate Cornell University's newfound commitment to engage in interdisciplinary research in international affairs. He envisioned international studies going beyond courses in area studies and foreign languages to include academic efforts to deal with economic, social, and development problems around the world. His foresight and leadership resulted in a design for the Center that insured its viability and growth into the future. Starting with a $3.25 million grant from the Ford Foundation in 1962, he raised more than $11 million to fund and endow international studies at Cornell during his leadership of the Center from 1960-1962, 1966-1968.
In 1964, he founded the Fondazione Luigi Einaudi in Turin, Italy in honor of his father. As Italian universities entered the turbulent 1960s, Einaudi recognized that European scholars were without necessary relief from teaching and administration needed to devote themselves to research. Hence, the Fondazione Luigi Einaudi was formed to transplant the American idea of the independent research institute to Italy. Today, it houses one of the world's most important economic history collections and gives postgraduate fellowships for students from around the world.
Retirement
Although Einaudi retired in 1972, he remained active in Cornell's Center for International Studies, advising students, supporting its many activities, and inspiring the founding and expansion of the Institute for European Studies. With the help of the Italian Government, Einaudi also raised the funds for the Luigi Einaudi Chair in European and International Studies at Cornell. Since 1987, the Chair brings distinguished European scholars working in fields related to Luigi Einaudi's interest to the Cornell campus on a rotating basis. In 1991, the Cornell's Center for International Studies was renamed the Mario Einaudi Center for International Studies. Cornell's Board of Trustees honored him for his long dedication to the University and as a "tireless proponent of clear and critical thinking, democracy, and ethics in politics; and a firm believer in the power of human values to transform the world." Mario Einaudi died in 1994 in Piedmont, Italy.