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“Diversity is our strength” is one of those phrases that now passes for settled truth. It appears in policy documents, school mandates, and corporate statements, rarely argued and almost never examined. Though it presents itself as an empirical observation, most of the time it functions as moral reassurance.
Since I am not a sociologist, I am not pretending to offer original research here. What I am doing is more modest: reading the best-known work in this area, noting the later reviews, and asking whether the slogan is actually supported by the evidence usually invoked in its defence.
On those terms, the answer is less flattering than the slogan suggests.
When people reach for the empirical case, the best-known starting point is Robert Putnam. In 2007, he published a major study on social capital in American communities built on the Social Capital Community Benchmark Survey, drawing on roughly 30,000 respondents through a national sample and smaller samples from 41 communities across the United States. In the pooled 41-site sample, the estimated effect of diversity on trust was negative in 39 of the 41 communities.
For present purposes, two things matter: the scale was serious, and the pattern was not some one-off local oddity.
Although Putnam is often invoked as if he were a critic of diversity as such, that is not what he was doing. In the same paper, he argued that increased diversity may, in the long run, bring important cultural, economic, fiscal, and developmental benefits, and that successful immigrant societies can build broader identities that overcome fragmentation. Even so, he also concluded that, in the short to medium run, immigration and ethnic diversity “tend to reduce social solidarity and social capital.”
That is the part the slogan politely steps around.
What Putnam found, moreover, was not a simple story of ethnic conflict. His summary remains the clearest: in ethnically diverse neighborhoods, residents of all races tend to “hunker down”; trust, including trust in one’s own race, is lower; altruism and community cooperation are rarer; and people have fewer friends. Contemporary reporting on the study described the pattern less as intergroup hostility than as a general civic malaise.
“The effect isn’t conflict. It’s withdrawal.”
While Putnam’s study is not the last word, neither is it some isolated embarrassment later research quietly buried. A 2020 narrative and meta-analytical review by Peter Thisted Dinesen, Merlin Schaeffer, and Kim Mannemar Sønderskov examined 1,001 estimates from 87 studies and found a statistically significant negative relationship between ethnic diversity and social trust across the literature as a whole. The association was stronger for trust in neighbours and stronger when diversity was measured locally. Adding covariates changed the relationship only slightly.
None of this means every study says the same thing, or that every context behaves the same way. It does mean the slogan cannot honestly be treated as a simple social-scientific fact. At best, the literature points to a more conditional and less comforting conclusion: diversity may bring benefits in some domains while also imposing real costs in trust, cohesion, and civic reciprocity, especially in the short to medium term.
Had public argument stopped there, the conversation would be easier. It does not. One reason progressive arguments on diversity can be so maddening to answer cleanly is that the problem is not just the evidence. It is the rhetorical structure built around it.
What you often get is a classic motte-and-bailey.
In its bailey form, the claim is large and ambitious: diversity makes societies stronger. It enriches institutions, strengthens communities, and should be treated as an obvious good. That is the version used in slogans, public messaging, and moral posturing.
The motte, by contrast, is smaller and safer: people from different backgrounds have equal dignity; plural societies can function; exposure to different people can be valuable; racism is wrong. All true. All defensible. All much easier to protect.
The trick, of course, is that these are not the same argument.
One is a broad empirical claim about what diversity does to trust, cohesion, and institutional life. The other is a narrow moral claim about how people ought to be treated. But when the broader claim comes under pressure, when someone points to evidence of lower trust, weaker civic engagement, or social withdrawal, the argument retreats into the motte. Suddenly the response is not “let’s examine the evidence.” It is “What, are you against diversity? Are you some kind of racist?”
That is the coercive move.
“The harder claim retreats. The safer claim takes its place.”
Once that happens, the moral core is used as a shield for a much larger empirical claim that has not earned that protection.
To say this is not to deny the moral core. It is to point out that it is being made to do dishonest work.
Equal dignity under the law is not the same claim as “diversity strengthens communities.” Opposition to racism is not the same claim as “more heterogeneity reliably produces more trust.” The first set of claims may be moral bedrock. The second set are empirical propositions, and empirical propositions do not become true because disagreement with them is made socially costly.
Nor is the underlying mechanism difficult to imagine. Social trust depends on shared expectations: language, norms, behaviour, obligation. As those expectations become less predictable, the cost of ordinary interaction rises. People become more cautious. Fewer interactions clear the threshold of “worth it.” The result is often not hostility, but distance. That basic picture fits both Putnam’s “hunkering down” formulation and the later finding that the negative association is strongest in neighbour trust and local contexts.
Less talking. Less joining. Less trusting.
None of that requires malice. It requires friction.
“The long run is not the short run.”
As Putnam himself argued, successful immigrant societies can, over time, construct broader identities and new forms of solidarity. Fine. Maybe. But that long-run possibility does not erase the short-run trade-off he reported, and the later review literature does not erase it either.
Here, “may” is doing a lot of work.
That outcome is conditional. It depends on institutions, norms, shared language, and successful integration over time. It is not an automatic by-product of demographic change, still less a magic formula that turns heterogeneity into cohesion by moral declaration. Putnam’s own formulation was that the central challenge for diversifying societies is to create a new, broader sense of “we.”
Possibility is not inevitability.
What raises the stakes is that the costs of lower trust do not fall evenly. They hit hardest where social capital is already thin: poorer neighborhoods, fragile communities, institutions with less slack, places where informal cooperation matters most. When trust declines there, the result is weaker networks, less mutual aid, and more pressure on systems already under strain. Social capital is not a decorative extra. It is part of what makes communities safer, healthier, and more governable.
Ignoring that does not make a society humane. It makes it less prepared.
“A slogan that cannot admit costs cannot guide policy.”
A serious discussion of diversity would start there. It would admit trade-offs. It would separate moral claims from empirical ones. It would stop pretending every objection is a moral stain and start asking the harder question: under what conditions can diversity be made compatible with trust, reciprocity, and shared civic life?
That is the real task. Not chanting the slogan more loudly. Not treating doubt as heresy. Not hiding a contested empirical claim inside a morally untouchable one.
In the end, societies that do that are not being honest. They are buying social peace on credit and hoping the bill never comes due.
References
- Robert D. Putnam, “E Pluribus Unum: Diversity and Community in the Twenty-first Century,” Scandinavian Political Studies 30, no. 2 (2007).
- Peter Thisted Dinesen, Merlin Schaeffer, and Kim Mannemar Sønderskov, “Ethnic Diversity and Social Trust: A Narrative and Meta-Analytical Review,” Annual Review of Political Science 23 (2020).
- Michael Jonas, “The Downside of Diversity,” Boston Globe, August 5, 2007.
Posted by the NDP’s Peggy Wright on X.
There is a recurring pattern in modern policy debates that most people sense but struggle to name. The argument presented to the public is not the policy that gets implemented. Instead, a broadly agreeable claim—something no reasonable person would oppose—is used to carry a far more specific and contested agenda into law. By the time the details become visible, the argument has already been won at the level that matters.
This is the structure known as the motte and bailey. The “motte” is the safe, defensible position: a statement so benign it feels almost churlish to resist. The “bailey” is the real position—the one with consequences, tradeoffs, and enforcement mechanisms. The move is simple. Sell the motte. Build the bailey. When challenged, retreat to the motte and accuse critics of attacking something obviously good.
You can see the pattern clearly in the recent dispute over education language. The public claim is that schools should be “welcoming,” “inclusive,” and respectful of “diversity.” No serious person objects to that in the abstract. But those terms are not operating as neutral descriptions. They have acquired specific policy meanings, often tied to particular ideological frameworks, institutional practices, and expectations placed on teachers and students. When legislation attempts to narrow or neutralize that language—shifting toward behavior-based standards like “safe and caring” environments grounded in responsibility and respect—the response is immediate: the government is “removing welcome,” attacking “diversity,” harming children. The motte is invoked as if it were the policy itself. The bailey disappears from view.
Watch the Move
In a recent legislative speech, MLA Peggy Wright provides a clean example of how this works in practice. She begins with a familiar image:
“Albertans put welcome mats in front of their doors. It means ‘come on in’ and we’re glad you are here.”
No disagreement is possible there. It is a moral and cultural baseline. But then the shift occurs. A change in statutory language becomes:
“the UCP is pulling up the welcome mat from all public schools.”
A metaphor replaces the policy. The audience is invited to react to exclusion rather than examine the legislation. The escalation continues:
“Gone are the days when schools were welcoming and inclusive places… celebrating diversity and uniqueness.”
At this point, the argument is no longer about wording. It is about intent, character, and harm. The key moment follows:
“the latest amendments… would strip words like ‘welcoming’ and ‘diversity’ from it.”
This is where the real question should be asked: does removing those words remove the underlying protections, or does it replace one framework of description with another? That question is never addressed. Instead, the speech returns immediately to moral framing:
“Diversity is a strength.”
In the abstract, yes. But the dispute is not over the abstract claim. It is over what “diversity” means in policy and practice. By collapsing the contested meaning into the harmless one, the argument avoids defending the actual implications. Criticism of the policy is recast as opposition to a universal good.
“The argument people agree to is not the policy that gets implemented.”
The most revealing line in the speech is this:
“Words are important… because they set the tone.”
That is true—and it explains the entire strategy.
This pattern isn’t random. It reflects a broader shift in how language is used in politics. Words like “diversity,” “inclusion,” and “safety” are no longer just descriptive. They function as instruments. If language helps shape how institutions operate and how people interpret reality, then controlling definitions becomes a form of power. Under that logic, you don’t need full public agreement on the details of a policy. You need agreement on the framing. Once that is secured, the content can expand behind it.
That helps explain why the motte and bailey is so effective. It allows advocates to operate on two levels at once. The public-facing level is morally attractive and broadly supported. The operational level is narrower, more contested, and often insulated from direct scrutiny. When the two are conflated, consent is manufactured. People believe they are endorsing a general principle when, in practice, they are enabling a specific program.
It works because most people are not trained to interrogate language this way. “Inclusion” sounds like inclusion. “Diversity” sounds like a mix of backgrounds and perspectives. “Safety” sounds like protection from harm. The terms carry moral weight before any definition is examined. By the time someone asks what they actually entail in practice, the rhetorical ground has already shifted. Opposition can be framed as hostility to the value itself rather than disagreement with its implementation.
The cost is not just confusion. It is the erosion of honest disagreement. If every critique of a policy can be recast as an attack on a universally accepted good, then meaningful debate becomes impossible. Language stops clarifying differences and starts concealing them. Institutions drift, not because the public has clearly chosen a direction, but because the terms of choice were never presented plainly.
This is why the technique matters. It is not just sharp rhetoric. It is a way of bypassing consent. If citizens cannot distinguish between the principle they are being asked to affirm and the policy that will follow from it, then they are no longer participating in a genuine democratic process. They are being managed through language.
If you think this reading is unfair, read the full remarks below and decide for yourself.
Appendix: Full Speech Transcript (April 2, 2026)
How to read this: Watch for the shift between general claims (“welcome,” “diversity”) and the specific policy being discussed. The argument depends on treating them as the same.
Full transcript of the video (Alberta Legislative Assembly session, ~1:57 long):
“Mr. Speaker, Albertans put welcome mats in front of their doors. It means ‘come on in’ and we’re glad you are here. And welcome to our house.But now the UCP is pulling up the welcome mat from all public schools.Gone are the days when schools were welcoming and inclusive places for students, celebrating diversity and uniqueness.That’s because the latest amendments to the Education Act would strip words like ‘welcoming’ and ‘diversity’ from it.This government combed through that bill and pulled the word ‘welcoming’ out eight times.Not satisfied with making our public schools less inviting — even as they function as important community hubs for many of our communities — then they went through and chopped the word ‘diversity’ out five times.Diversity is a strength.It used to say so in government policy, in legislation. But I guess not anymore.Words are important, Mr. Speaker, and that’s because they set the tone.When those in charge are threatened by words like diversity, welcome, and sense of belonging, there’s a problem. Because this is then about ideology and politics outside the classroom, not within.Instead of focusing on reducing class sizes, hiring teachers, and ensuring supports are there for all kids who need them, we get this distraction from a bill and government intent to narrow the frame so much that there is room for only one worldview: the UCP’s.And that’s the point.Straight out of the authoritarian playbook, Mr. Speaker.But, Mr. Speaker, our kids deserve that welcome mat back. I, for one, am extremely happy to let them know that they can expect it come next election, when it’s NDP in government and UCP — not our kids — who will find themselves unwelcome.”
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