Therefore it can be a contributing factor to a societies downfall. Theres a reason why colonial powers took over countries with relative ease and it wasn't just firepower and strategic military prowess.
Obviously every collapse hurts least, or even rewards those whose material ways are designed to do well when society sucks.
So at the bottom of the cycle there is homogeneity. But that does not mean it is the homogeneity keeps a society strong or the diversity during the peak that makes it fragile. It just means that those prepared for the bad times are alike. It would be foolish to assume decadence in diversity rather than assume there are cycles and different people flourish at different points.
Theres a reason why you always see working class people at protests regarding living and societal conditions because they are always the ones who feel the first effects of a society in decline, often its the middle and upper class liberals that passes judgement on these people and label them the usual names all because they have genuine concerns about the community that they live in and who have the most to lose, they're often portrayed as simple minded moronic people, theres a good reason why a lot of working class people cant stand liberals as they are being lectured to about how things should be with outcomes that will never affect those liberals, the irony being that these very middle and upper class liberals telling us that diversity is our strength all whilst they live in gated homogeneous communities. I'm not accusing you of being this type of liberal btw, it's just an observation.
That's just rhetoric though. Some of the most stable and safest countries eg Japan and until recently Scandinavia don't have many immigrants.
USA at its height had a dominant culture. Objectively diversity by itself has no real benefit it seems. You just end up with a heap of people who don't really get along.
There is no question that states willing to tolerate diversity in their populations have an enormous advantage over states that do not.
Immigrants themselves generally don't believe in diversity, that's the whole reason why they mostly move to areas to live with people who are most like them.
The fact that left wing people tell us how amazing places like Japan are is telling but the irony is Japan is considered quite homogeneous, a patriarchal society that still largely believes in tradition, the nuclear family, gender roles and hierarchy and also limits as much as it can on immigration and refugee intake and economically is very capitalistic hosting many of the largest companies in the world. Basically everything the left continuously claims is horribly wrong with the West is on full display in Japan, a country that they literally worship for its way of life. Consider that the USA lives in the most progressive era in all of human history, it is more liberal than it has ever been yet it is considered to be so horrible and its always someone else's fault for the horrible failings.
Diversity is strength. But a lack of ties that bind is still a weakness.
If diversity is a strength then you need to be able to demonstrate this?
I don't believe diversity is all doom and gloom like my postings might suggest, I believe that it just has a threshold.