The guilds, banks, and money systems begun in Medieval Europe

discouraged European exploration

contributed to decreased trade

were the start of modern market economies and trade unions

were ultimately rejected by Europe in favor of colonialism

The guilds, banks, and money systems, which began in Medieval Europe, were the start of modern market economies and trade unions.

Before them, there were no real market economies or unions - the guilds were the first type of a union of traders who wanted to unite and fight for their rights together.