The enlightenment ideas were the justification for the developing system of capitalism, in a similar way to how Christianity functioned as the justifying system of Feudalism.The ideas underpinning the French revolution were not invented by peasants, the most oppressed group in French society, but rather by the emerging middle class of traders, merchants and small business owners. They were the ones who did a lot of the fighting during the revolution and they became something like the new ruling class once feudalism had been overturned. The enlightenment ideas cannot be looked at in a vacuum. With the growth of technology and the emergence of global trade, more efficient farming and small scale manufacture, ideas to justify this system, which was constrained by the feudal guild systems, the lack of free moving workers and Christianity's view on greed, the enlightenment ideas were the inevitable justifying ideas, the new priests of capitalism, greed and free movement of labor. This can be seen similarly in the way that organized religion was first invented and popularized, at around the same time as organized sedentary farming, which it justified.