Really? It bears out everywhere I've ever lived and also in the archaelogical record.
Don't make the mistake of equating inequality with poverty. Specialization is certainly a great driver of efficiency and wealth creation. This trade-off can be fine (in a rising tide floats all boats sense) but we have to keep our eye on the levers.
I mean, if your definition of equality is 'everyone is equally poor', then I suppose subsistence farming is what you want to aim for.
If you then urbanize, your inequality increases rapidly. But since we already have an urban, industrialized society, increasing density is not going to move the needle on inequality. It's arguable it'd move backwards because more people can suddenly live in a desirable area.
