Catechism number 2240

Submission to authority and co-responsibility for the common good make it morally obligatory to pay taxes, to exercise the right to vote, and to defend one's country:

[Christians] reside in their own nations, but as resident aliens. They participate in all things as citizens and endure all things as foreigners.... They obey the established laws and their way of life surpasses the laws.... So noble is the position to which God has assigned them that they are not allowed to desert it.⁴⁶