Seats of power are cultural magnets
According to Wikipedia:
A magnet […] is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials like iron and attracts or repels other magnets.
Analogously, we could say that seats of economic and/or political power (e.g. Tokyo, London, New York, Lagos) are huge magnets that produce invisible magnetic fields. These fields are responsible for a force that pulls on certain cultural materials and practices and attracts or repels other magnets. Culture is the total way of life of a people living under the influence of a powerful magnet.