Confucianism is a philosophical doctrine and ethical code. It assumes human beings are fundamentally good, and teachable, improvable, and perfectible through personal and communal endeavor. This can take the form of ancestor worship, submission to parental authority or the use of family metaphors to describe political leaders. The family is the most important group for Confucian ethics, and devotion to family can only strengthen the society surrounding it. There are 5 further central values: reciprocity, loyalty, propriety, humaneness and justice.