>protecting your country even when it doesn't actually benefit you
Perhaps this needs some nuance. It seems like duty has some relevance here. Military service may not actually benefit someone directly, and it could easily be a detriment at the individual level. But societies struggle to operate effectively for very long when everyone takes an individualistic transactional mindset. At some point, it becomes a collective action problem that needs to find a balance between serving a sense of duty to society as a whole and society not taking advantage of such sentiments.
Perhaps this needs some nuance. It seems like duty has some relevance here. Military service may not actually benefit someone directly, and it could easily be a detriment at the individual level. But societies struggle to operate effectively for very long when everyone takes an individualistic transactional mindset. At some point, it becomes a collective action problem that needs to find a balance between serving a sense of duty to society as a whole and society not taking advantage of such sentiments.