America’s colleges and universities ought to advance the public interest by serving as bastions of old-fashioned liberalism. If they did, they would champion free speech. They would establish communities of scholarship, teaching, and learning grounded in civility, toleration, and equality under law. And they would transmit knowledge about the sciences, social sciences, and humanities while cultivating students’ capacity to ask questions, listen attentively, examine evidence, formulate their opinions, and persuasively convey their views.Instead, America’s colleges and universities purvey illiberalism by punishing dissent from campus orthodoxy, rewarding intolerance, treating individuals unequally under the law, and politicizing the curriculum.The recovery of liberal education in America depends not least on liberals’ recovery of liberalism.For decades liberals have dominated higher education in America. Why did they transform, or fail to prevent the transformation of, the nation’s colleges and universities into institutions advancing illiberal education?Several hypotheses spring to mind.A progressive revolutionOne possibility is that liberals subordinated education to the promotion of progressive priorities. Convinced that they discovered the guiding principles for politics, the formulas for generating fair and effective public policy, and the mechanisms for implementing it, liberals demoted rigorous study of America, the West, and the world.They marginalized messy and time-consuming debates about competing principles and rival preferences. They disseminated what they regarded as the final word about political norms, practices, and institutions. Instead of assisting students to gain appreciation for their civilizational inheritance, they concentrated on equipping them to change the world in accordance with progressive theories of justice and jurisprudence.Another possibility is that liberals suffered from a ruinous mix of conformism, complacency, and cowardice. Formally committed to a diversity of perspectives — while identifying diversity with an openness to the varieties of progressivism — liberal professors in the 1970s welcomed a new generation of graduate students to campus who espoused a variety of left-wing doctrines. These students viewed scholarship and teaching as politics by other means.In the 1980s, liberal faculty tenured the post-1960s generation of scholars. In the 1990s, liberals stood idly by as the recently tenured professors institutionalized political correctness by promulgating speech codes, truncating due process for students accused of sexual misconduct, and exploiting the curriculum to inculcate progressive doctrine.In the 2000s, with the students of the post-’60s generation professors entering the professoriate, faculty discovered new weapons to enforce uniformity of opinion, including trigger warnings, microaggressions, and bias-response teams. Few were the liberals who challenged these illiberal measures or contested the illiberal slogan, “Speech is violence,” that justified them. Most campus liberals held their tongues for fear of that dreaded censure: “conservative.”RELATED: Harvard’s hypocrisy hits the courtroom Photo by Cassandra Klos/Bloomberg via Getty ImagesIn the 2010s and 2020s, with critical race theory and diversity, equity, and inclusion programs ripening into full-blown progressive wokeism, conventional campus wisdom proclaimed that “silence is violence.” Liberals evaded accusations of complicity with violence by openly embracing the fashionable theories according, which concluded that America is racist to its core, necessitating that government and private-sector organizations give decisive weight to race, sex, sexual orientation, and gender in allocating rights, responsibilities, and benefits.A third possibility is that liberals confused sophistication in moral reasoning with sound ethics. Under liberal supervision, college courses on moral reasoning proliferated. These typically provide students with fanciful moral dilemmas, like whether you should pull a switch to divert a runaway trolley from striking five people tied to the track onto another, which would kill one immobilized baby. Or students were served divisive public policy questions about abortion, affirmative action, and same-sex marriage.Professors invite students to apply a variety of theoretical perspectives — from which professors typically exclude traditional conservative considerations — to resolve the moral dilemmas or settle the public-policy debates. Such courses in moral reasoning foster the delusion that the moral life consists of clever reasoning in support of progressive ends rather than in the exercise of courage, self-restraint, integrity, generosity of spirit, friendship, and the other moral virtues. Moreover, they reinforce the prejudice among professors that only those who equate progressive moral reasoning with moral excellence deserve faculty appointments, administration positions, and a respectful hearing in the public square.Liberals reclaiming liberal educationIt would be useful for liberals to examine these hypotheses — and others — that endeavor to explain one of the great failures of liberalism over the last 75 years: the demise on liberals’ watch of liberal education in America.Cass Sunstein appears well-suited to the task. A longtime Harvard Law School professor, Sunstein is a distinguished and remarkably prolific scholar, by far the most cited in legal academia. He has written widely and influentially on law, politics, and economics. He possesses substantial government experience, having served from Sept. 2009 to Aug. 2012 as the Obama administration’s head of the Office of Information and Regulatory Affairs. And he is the author of a short and lucid new book, “On Liberalism: In Defense of Freedom,” that restates liberalism’s core convictions and maintains that it deserves the allegiance of Americans of diverse viewpoints and persuasions.Explaining where liberals went wrong in governing American universities is inextricably connected to understanding liberalism and defending freedom. Yet the closest Sunstein comes to even acknowledging the problem is the anodyne remark that liberals “do not like the idea of orthodoxy, including on university campuses.” That, however, is like saying that corporate executives who bankrupt their companies don’t like losing money. The issue is how those in charge contribute to their organization’s downfall.“Liberals,” Sunstein states, “prize two things above all: freedom and pluralism.” Liberal freedom means in the first place that “people are allowed and encouraged to establish their own path, to take it if they like, and to reverse course if they want to do that.” Pluralism follows because people, possessing different backgrounds, skills, and interests, will choose different paths or alter course by their own lights. Liberalism so understood forms an enduring part of the American creed.America’s colleges and universities purvey illiberalism by punishing dissent from campus orthodoxy, rewarding intolerance, treating individuals unequally under the law, and politicizing the curriculum.However, Sunstein writes, “More than at any time since World War II, liberalism is under pressure — even siege.” New right critics “hold it responsible for the collapse of the family and traditional values, rampant criminality, disrespect for authority, and widespread immorality.” Intellectuals on the left decry liberalism’s inability “to handle the problems posed by entrenched inequalities, racism, sexism, corporate power, and environmental degradation.”Sunstein’s book responds to the “urgent need for a clear understanding of liberalism — of its core commitments, of its breadth, of its internal debates, of its evolving character, of its promise, of what it is and what it can be.”Liberalism, he observes, has roots in the premodern virtue of liberality, which encompasses generosity, openness, and public-spiritedness. During the 17th and 18th centuries, the thinking and practices that acquired the name liberalism in the 19th century came to be associated with religious toleration and limited government.In 20th- and 21st-century politics, some liberals emphasized negative rights, or freedom from coercion particularly by government; others stressed positive rights, or entitlements to government assistance — in housing, education, and health care. In academic political theory, John Rawls developed the leading account, which views liberalism as centrally concerned with basic political principles to which all reasonable citizens should agree; other academic liberals hold that liberalism consists in promoting autonomy as the highest human ideal.Sunstein celebrates liberalism as a big tent and fighting faith while preferring a progressive liberalism that revolves around John Stuart Mill’s “experiments of living.” Believing that the state should assist citizens to experiment adequately, Sunstein favors a government that, under limited circumstances, counters citizens’ expressed preferences to enhance their deliberations and make their choices more reasonable. He considers measures that extend from government information campaigns, accurate labeling, and mandatory seatbelt laws to tax incentives, cap-and-trade systems, and fuel-economy mandates.Sunstein’s sophisticated yet accessible discussions of the rule of law, free speech, markets, regulation, and government’s role in ensuring the material and moral bases of security and opportunity provide a welcome corrective to the proliferating misunderstandings of the liberal tradition along with its many faces and supple sensibilities.Missing the markHis brief for freedom also reinforces liberal narrow-mindedness and smugness.First, Sunstein mischaracterizes liberalism’s core. It is not, as he asserts, experiments of living, but rather, as John Locke and America’s founders affirmed, the conviction that human beings are by nature free and equal. This conviction sustains liberalism’s big tent, which hosts, among others, those like Sunstein who are drawn to experiments of living.Second, Sunstein dismisses and deflects liberalism’s critics, right and left, rather than learning from them. This is costly because liberalism’s critics have much to teach about liberalism’s tendency, like all schools of political thought and all regimes, to carry its principles to an extreme.RELATED: Students are trapped in mandatory DEI disguised as coursework Photo by filo via Getty ImageLiberalism’s vices include the dissoluteness bound up in the tempting belief that opposition to coercion entails overcoming the imperatives of morality. It also fosters the complacency that stems from overreliance on formal procedures to mete out justice. And it is steeped in the arrogance that assumes liberals have refuted faith and supplanted rather than supplemented classical teachings on ethics and politics. Brushing off critics, Sunstein fails to explore the extent to which liberalism finds itself “under pressure, even siege” because of its own shortcomings.Third, Sunstein idealizes liberal character. He depicts liberals as secular saints neither deficient in certain virtues nor prone to specific vices. Yet to take one telling example, liberals, as Mill argues in “On Liberty” and elsewhere, tend to disregard the wisdom stored up in traditional writings, inherited beliefs, and established institutions.Sunstein’s disregard of essential wisdom stored up in the modern tradition of freedom — particularly its early appreciation of freedom’s dependence on biblical faith and classical political philosophy — converges with the biases of many of his left-liberal friends and colleagues. This disregard begins to explain his and their failure to connect liberal education’s demise to liberals’ departures from the liberal tradition in its richness and fullness.The recovery of liberal education in America depends not least on liberals’ recovery of liberalism.Editor’s note: This article was originally published by RealClearPolitics and made available via RealClearWire.