Strength sports generally rely on the same genetic traits as explosive speed sports like track or NFL.
For this west african genetics are king. God knows why west africans were blessed with the physical traits that they were, but they are undeniable. The majority of the population has a tendency to be long limbed, wasp waisted, and as heavily muscled as most people worldwide would get on a perfect diet which included dianabol.
But the potential of mixed genetics is even greater.
I'm not an expert in genetics but I'll share the little I know.
In animal breeds;
The first generation or two of mixed offspring from "pure bred" parents are known as hybrids. In the right combinations these can yield extreme examples of "good" or useful genetic traits of parents.
One example is the Cornish cross chicken. These is the type of chicken that is produced worldwide as the only commercial chicken for eating. Why? Because it grows to adult size in 4 weeks where other traditional breeds would take 6months.
It was created by accident when some British aristocrats were trying to create the ultimate chicken for cockfighting. They bred the most muscular , heavy chickens and ended up with a freak chicken that packed on flesh so fast it couldn't even stand up.
Hybrids do not have stable genetics, so the offspring of hybrid animals or plants will not reliably be similar to their parents but can have odd combinations of traits from previous generations.
The places that west africans ended up through slavery introduced their genetics to an immense variety of others. White Europeans, native Americans, Indians (the South Asian kind were taken to Carribbean islands too), native islanders. Countries like Cuba, Brasil or the USA have immensely varied genetic mixing occurring at different times in history.
Dark skinned American "blacks" who everyone would assume have purely west african genetics nearly always have some European in them.
And for some reason first generation mixed heritage people in Anglosphere at least, are always known as "black" (meaning genetically African) no matter how pale they are.
All of those first generation mixed kids have one fully "white" European parent, usually the mother. Yet are known as black.
Anyhow,
Coming back to the point. I think it's clear that west african genetic excel in what most of what we consider as strength/speed/power athleticism.
Mixed genetics has even greater potential, but it would be impossible to judge what combinations yield the best results because of the extremely varied histories of genetic mixing in all mixed populations. Remember that even "white" people in most places but especially the USA have extremely mixed up genetic histories over the past few hundred years too. A thousand years ago you would have been able to much clearer differences between different Europeans and ofc white Americans did not exist yet.
After west Africans, wherever the tallest ( but not rake slender ) people are will be the most athletic and having most potential for all out max strength. Netherlands and Iceland come to mind.
P4P wilks type strength however is a different matter entirely. Historically it seems to have been North Africans, Turkish and Albanians who have been the greatest of pocket Hercules type athletes.
China and North Korea seem to be taking the title today.
Ironically west Africans could definitely NOT be contenders for strongest in this category. Not enough of them are midget sized.