I think about this a lot. I don't think it's a coincidence that most of the countries lauded for their economic equity or environmental leadership are also largely homogenous societies.
I don't know what the answer is for a fundamentally multicultural country like the US but obsessing about race and "representation" surely isn't it.
I've been thinking about this a bit lately and it reminds me of the "melting pot" metaphors we learned about in middle school. Rather than having a bunch of disparate, competing identities I think America is only going to work well when we form a single united, composite identity. I'm not sure if this is nationalism or not, but if it is, it's an ethnically-inclusive nationalism which seems markedly better than the scary kinds of nationalism from the 20th century and earlier. It probably does imply some assimilation, but it's not necessarily everyone assimilating to some "white identity"; rather, everyone assimilates toward the composite "American" identity (whatever that is). I'm not sure if this is what "multicultural" refers to or if it refers to the more progressive ideal of segregated ethnic lanes competing with one another, but the last 5-10 years makes me feel like the latter is untenable.
The other part, the segregated ethnic lanes is often referred to as "patchwork quilt". The idea is there is no assimilation only people living side by side in harmony, but we're seeing exactly how those borders between identities are creating mayhem, not harmony.
Patriotism is liking your country and wanting other people to become part of it if they want to. After all, if your country and culture is the best then people should be allowed to become part of your culture and thereby become better!
Nationalism is liking your country and wanting other people to be kept separate. After all, if your country and culture is the best then anyone else is inferior and shouldn't be allowed to dilute your perfection!
The theory might not be correct
Bulworth: "Everybody just gotta keep fuckin' everybody 'til they're all the same color".
From the movie "Bulworth":
America had some really high end social technology to address this. Having freedom of religion and people who practiced many religions has, for many other countries, been very divisive, see India/Pakistan, Yugoslavia, and many others.
So the U.S. created a civic religion to ride on top of all of the other religions. The civic religion has the pledge of allegiance instead of a prayer, co-opts mostly Protestant ethics, and instead the Bible, it has the constitution, and a set of semi-mythical stories like George Washington not being able to tell a lie about chopping down the cherry tree, and Honest Abe walking 10 miles to return two cents change.
The trouble with all of this stuff getting cancelled is that it's not being replaced with anything that serves the same functional purpose of putting everyone on the same page and fostering trust among people with different backgrounds.
It's no accident. The easier it is to divide the workers against themselves, the easier it is for capital to come in and rob them all blind.
HN loves criticizing "wokeness" but it's good to understand these divisions and how they have been used against us historically to maintain economic power structures that exist to benefit wealthy property owners.
The issue is that you can't put a bandaid on this and call it a day. You won't solve anything by appointing more minorities. Until people get wise to the real game being played by capital, we'll continue to fight among ourselves for scraps based on cultural identity.