Perhaps it means that this is a known problem with known working solutions. Countries that haven't solved identity are ones that either don't want to or can't, generally due to a mix of corruption and poverty.

Perhaps I am simply suffering a tragic failure of imagination, but I fail to see how adding a blockchain changes things substantially.

Being able to identify people via blockchain either requires them to remember some esoteric passphrase or an ID card with the identifier on it which...solves absolutely nothing.

> Countries that haven't solved identity are ones that either don't want to or can't, generally due to a mix of corruption and poverty

It's not a known problem because each country has its own context. That's like saying US healthcare problem can be solved just by doing what nordic countries do.

I'm not arguing for blockchain.