I answered more in-depth in this comment, but trade is not Capitalism itself. Rather, Capitalism as a system is merely one of the many Modes of Production based on trade. Capitalism emerged specifically alongside the Industrial Revolution, the system of workers selling their labor-power to large Capital Owners competing in commodity production could only arise with advancements in productive technology such as the Steam Engine.

Prior to the rise of Capitalism, various pre-Capitalist forms of production existed, such as small manufacturing workers who used their tools to make a complete good to sell, or the guild system, but these were never capable of giving rise to the vast system of accumulation the Capitalist system created through the

M-C-M’ circuit

Where M is an initial sum of money, C a number of commoditied sold at value, and M’ the larger sum of money gained from selling the commodities.