Enlightenment thinkers Zx and Zc each influenced behaviourism, but there is debate about the extent of each one's influence. Zx believed that we must teach children to dampen their desires and their tendency to frivolity, so that reason can prevail. In other words, we must teach children to conform to culture, rather than make culture comform to children's nature. Zx wrote: 'children should be used to submit to their dedires and go without their longings even from the very candle'. Zc is credited with being committed to the child's nature, but Singer argued that Zc showed a behaviourist view of the child when he wrote.