Seven Theses Against Viewpoint Diversity – AAUP
HomeAcademeIssuesFall 2025: Defending Academic ValuesSeven Theses Against Viewpoint DiversitySeven Theses Against Viewpoint Diversity
The problems with arguments for intellectual pluralism.
By Lisa Siraganian
Among the various eye-popping demands the Trump administration made of Harvard University in its infamous April 11, 2025, letter was the bullet point on “Viewpoint Diversity in Admissions and Hiring.” By August 2025, the letter stated, Harvard had to commission an outside party “to audit the student body, faculty, staff, and leadership for viewpoint diversity, such that each department, field, or teaching unit must be individually viewpoint diverse.” The term viewpoint diversity was not defined; perhaps its meaning seemed obvious. In addition to other requirements to increase the variety of different perspectives, the letter commanded that any Harvard unit deemed deficient in such diversity must be “reformed by hiring a critical mass of new faculty” to counterbalance the viewpoints of those already employed. Presumably Harvard’s current faculty were imagined to be viewpoint-homogeneous.
Editor’s Note: Letter to Harvard, embedded below; direct link: https://www.harvard.edu/research-funding/wp-content/uploads/sites/16/2025/04/Letter-Sent-to-Harvard-2025-04-11.pdf
Letter-Sent-to-Harvard-2025-04-11Download Why didn’t “viewpoint diversity” require definition? Probably because the movement—whether under the label of viewpoint or intellectual diversity or ideological and intellectual pluralism—was old hat to the letter’s authors. In 2002, conservative activist David Horowitz reworked the AAUP’s long-standing definition of academic freedom to advance his “Academic Bill of Rights,” a declaration promoting “intellectual diversity” and “intellectual pluralism.” That short manifesto kicked off a revolution. It first developed in conservative circles for decades, drafted as proposed laws introduced both in the US Congress and in various state legislatures. Echoing Horowitz’s position, the “Bill of Rights” of the conservative University of Austin, launched in 2021, explicitly vows that the university “aspires to intellectual pluralism.” Most recently, the same language appeared in the Heritage Foundation’s Project 2025, the blueprint the second Trump administration relies upon. Its chapter on eliminating the Department of Education asserts that postsecondary educational institutions receiving federal funding must “embrace intellectual diversity.”
In what follows, I offer seven theses against viewpoint diversity in any of its guises. If its supporters are as open to competing perspectives as they claim, if viewpoint diversity means committing oneself to a robust debate about truth and values, then the movement should be open to responding to and refuting the following theses challenging its premises and fundamental arguments. The options, in the end, come down to the following: To promote viewpoint diversity is to be thrilled to have my views in the mix, even if you think they are wrong, because either (a) they contribute to more viewpoint diversity (the more views you have, the more viewpoint diversity there is), or (b) they provide more views to choose from to figure out which view is the most true. In the first position, you end up not caring about whether a particular view is true or good, because you care about viewpoint diversity intrinsically: What matters is having the greatest possible variety of views. In the second position, you instrumentally value a diversity of views; having viewpoint diversity only matters until you can figure out which view is the best or most true, at which point all the other views can be rejected.
I’ve restricted my discussion here to higher education, both because that is the AAUP’s ambit and my own and because that is the current terrain of most of these debates. But the movement is not limited to attacks on colleges and universities. Project 2025 recommended that the Environmental Protection Agency review and reorganize science advisory boards that lack such viewpoint diversity. In addition, what follows are not entirely my original arguments, and many of the theses necessarily overlap. But, as the second Trump administration continues to weaponize “viewpoint diversity,” the most serious deficiencies and problems with the concept have not yet been adequately detailed, addressed, or refuted. All of these problems must be addressed if the call for viewpoint diversity is serious, self-consistent, and offered to higher education in good faith.
The basic logic of the argument works like this. A pronouncement is made (as self-evident fact) that colleges and universities have become overwhelmingly politically liberal and that such political homogeneity “inhibits the pursuit of truth.” Frequently, the ideas of political philosopher John Stuart Mill are invoked, such as his observation, in On Liberty, that competing opinions in politics should be able to be “expressed with equal freedom,” because individuals do not have “sufficiently capacious and impartial” minds to see the entirety of truth for themselves. A situation in which the brightest and most curious thinkers feel they have to hide their true convictions would be a very bad state of things indeed. Such self-silencing, fretted Mill, deprives the world of “the open, fearless characters, and logical, consistent intellects who once adorned the thinking world.”
For advocates of viewpoint diversity, such as the founders of Heterodox Academy (the conservative nonprofit created in 2015), freeing conservatives from their alleged self-silencing is a crucial step in reforming higher education. Homogeneous academic groups, they say, risk becoming “monocultures” and are vulnerable to “blind spots and groupthink” (or “ideological capture,” as the letter to Harvard from the Trump administration put it). Viewpoint diversity is pledged to liberate the muzzled, not only politically but throughout their professional, academic lives. To “insist on viewpoint diversity,” Heterodox Academy announces in its manifesto for university reform, is to challenge “norms that promote self-censorship or discourage dissent.” Politically heterogeneous academics will be able to think fearlessly and to Make Universities Great Again.
We are trained as scholars to reflexively recoil from hegemonic views wherever we spy them. Tyranny of the majority is a legitimate concern, and we should conscientiously challenge any view on which we substantively disagree in our field of expertise. But however seriously one worries about “groupthink” in academia, viewpoint diversity is not the answer. It only offers us another quota system. The following theses are presented, then, as an invitation to viewpoint diversity’s inquiring intellects to defend their convictions openly, fearlessly, and logically (to paraphrase Mill).
Thesis 1. Viewpoint diversity functions in direct opposition to the pursuit of truth, the principal aim of academia.
Proponents of viewpoint diversity are making a version of the both-sides argument—that is, they intuit that a plurality of opinions is better for students and faculty committed to pursuing the truth. They often invoke the rhetoric of ecological biodiversity, along with Herbert Spencer–style social Darwinism and a sprinkling of Oliver Wendell Holmes Jr.’s “marketplace of ideas.” Advocating for “the world’s first truly inclusive university system,” John Tomasi, president of Heterodox Academy, advances a version of perspectival pluralism: “Think of the university as a kind of garden: When the students arrive there at eighteen, . . . they step into a world now that’s new for them, where they can become more unique, more individuated, than ever before in their lives, because the garden is meant for that, to encourage that kind of growth, that kind of diversification. A university, like a garden, should be full of surprises.”
The implication is that current university culture has become a monoculture of sterile ideas; the Edenic garden of free-thinking biodiversity has been lost. A university “fundamentally committed to truth” would want the most varied garden possible to form “more unique” students. Or, to quote Chairman Mao, “Let one hundred flowers bloom.”
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