上句见：Day291
The Story of Philosophy《哲学的故事》第1章Plato第5节V. The Political Problem第3段第4句：

He answers, because of greed and luxury. Men are not content with a simple life: they are acquisitive, ambitious, competitive, and jealous; they soon tire of what they have, and pine for what they have not; and they seldom desire anything unless it belongs to others. The result is the encroachment of one group upon the territory of another, the rivalry of groups for the resources of the soil, and then war. Trade and finance develop, and bring new class-divisions. "Any ordinary city is in fact two cities, one the city of the poor, the other of the rich, each at war with the other; and in either division there are smaller ones — you would make a great mistake if you treated them as single states"(423). A mercantile bourgeoisie arises, whose members seek social position through wealth and conspicuous consumption:"they will spend large sums of money on their wives"(548). These changes in the distribution of wealth produce political changes: as the wealth of the merchant over -reaches that of the land-owner, aristocracy gives way to a plutocratic oligarchy — wealthy traders and bankers rule the state. Then statesmanship, which is the coordination of social forces and the adjustment of policy to growth, is replaced by politics, which is the strategy of party and the lust for the spoils of office.
浙江大学译本：随着贸易和金融的产生和发展，出现了新的社会阶级分化。

解析

1、 Trade and finance develop, and bring new class-divisions.
商业与金融的兴起带来了新的阶级分化。

这个短句在这段起衔接作用，在它之前在讲个人，在它之后在讲社会结构。