 When a foreign power threatens the constitutional order in a liberal democracy, political morality seems to direct citizens to defend the order in a particular way. Citizens must approach national defense as a communal enterprise in which they organize themselves to achieve a certain common level of security together through various forms of burden sharing and resource pooling. Burden sharing, in this case, requires every member of the community to participate in some way in carrying the collective burden of fighting the threat. Some citizens will do the actual fighting, but others will contribute by treating the wounded, developing weapons, taking care of children, sending care packages to soldiers, rationing essential resources, and so on.