Well the problem with trying to subdivide humans is that

A) it's actually really really hard to do, so hard in fact that it's impossible and is a pseudoscience B) it basically always results in comparison. Which gets bad REALLY quickly because suddenly there is a better or worse, an inferior and superior.

I'm not saying we aren't different, I'm not saying that.

But, as far as species, we ARE all the same. You, your sister, your neighbor, your great great great grandfather. We all have our differences and generic differences, but they're infinitesimally small, we are just VERY good at telling the differences because we're so used to staring at the same face over and over.

There's just so much crossover and mixing and volatility. People can change from one to the other or halfway and stuff, there's no clarity. Like, me, for example: I'm a mix that people look at me and get very wrong 95% of the time. And then if I have kids with somebody that doesn't have the exact same mixed heritage with me, it's like... Wtf do you even call me?

And then if you learn some anthropology and learn that long thin limbs and people are from hot climates close to the equator, and short ratioed people are from further (surface area to mass ratio, keeping warmth) away from the equator where it's cold.

Like.... You can be vague and descriptive a little about it, but when you realize that reality is just that we're all the same species, with no limits to interbreeding, it makes so much more sense.

Let's say you take a pale-ass white guy and strand them near the equator for ten years outdoors. Does that guy suddenly become a different breed or race or whatever you want to call it? No.. it's the same person, the same species, even if he looks different - he just adapted and his body is like "holy fuck it's hot and I'm trying my best to not get skin cancer and the right amount of vitamins from the sun".

And same thing for brown skinned people (let's just say Mexican natives). You take a young couple with darker brown skin, and move them to norway or somewhere cold with VERY little sun (latitude). They are going to lose melatonin in their skin and become paler. Let's say they have kids and you inbreed them for a few generations. They will get progressively more pale, and start to look more adapted to the region, likely even take on regional issues.

And the reason why is because we're all the same type of monkey. (Not actually monkey because that's a different offshoot, but primate; we're great apes!).

You've never had infants around other infants.

We all have the same child. They all act the same behavior is the same.. Patterns are the same Etc..

Humans don't really start to develop in different directions and speed until they are like 18 months old.

Our coloring and physical features might not be the same.. but the basic operating system and internals are all the same across humanity.

Breeds are defined by organizations that determine breed based on lineage, followed by conformation. They do not align across different countries. Dogs have the AKC, CKC in America. They don't follow the same definitions. It also causes lots of issues to classify things like this and leads to bad decision making by lots of people. Even as it is now, there's no clear definition for things like Pit Bulls. There's also a ton of health issues that arise from defining breeds and trying to follow this logic.

Humans are not controlled and bred based on these things so a Breed Standard would not be possible. There is simply a continuous line of people.

Perform a cluster analysis on dogs - they will kind of fall into clusters because we bred selectively for them. But humans, which have not been selectively bred even in smaller geographic regions, would not provide decent clustering results based on race categories.

Without good clustering, whatever groups you make have more inaccuracies than accuracies in your grouped statements. (Border collies are high energy, greyhounds are lazy > 65% true at best) this is because of the insane complexity of DNA and the lack of selective breeding artificially limiting the DNA diversity. Plus other stuff.