Intuitively this seems like an obvious result of the network effect. (edit: I&#x27;m not intending to belittle anyone here and I apologise if it may seem that way).<p>Axiomatically, socially the sum of two humans is greater than the two humans apart.<p>And large cities, with metros, many villages that melt into one, employment opportunity, talks, bars, etc, are the embodiment of what it means to be social (with some exceptions - community feel being an important one).<p>In the UK this is at the forefront of politics - it is obvious to anyone that the country is governed as &#x27;London plus appendages&#x27;. The rail and road networks are basically built around the capital. Most public transport subsidies go to the capital. The important (in a status sense, not in an absolute sense) businesses are headquartered there.