The United States, for example, created a unified national market once its federal government wrested sufficient political control from individual states. This was far from a smooth process, as the American Civil War amply demonstrates.
比方说美国，在联邦政府从各州政府手中获得足够的政治控制权后，就创立了一个统一的国家市场。 曾经发生的美国内战充分表明，这一过程远不是一帆风顺的。