If a country’s government undertakes to fight a war for some reason other than self-defense, for a purpose which the citizens neither share nor understand, it will not find many volunteers. Thus a volunteer army is one of the best protectors of peace, not only against foreign aggression, but also against any warlike ideologies or projects on the part of a country’s own government.
This statement captures the essence of liberty, which is peace. And Rand grasps the concept that volunteerism to military duty, is correlated to self=defense and not ideological commitments, or agendas! No one likes to be co-cerced. Co-cercion demeans and demoralizes humans and treats them as commodities or of expendable value.
That means that to remain a free people we must not war along ideology (religion or politics) or independent agendas (without co-operation/negotiation). It becomes complex when there are so many agendas that clash with another's. And what about a nation's values if they conflict with another's? Will there be consensus building in determining how to go 'forward"?
Diplomacy is needed more than ever today, because the world is wrought with so many conflicts. The wars our country is involved in now, have not been declared "wars" by Congress from the beginning. Though there needed to be some response to the 9-11 incidence, was there consideration about all the reprecussions?. Self Defense is important for any entity that has separate interests or distinction. This is important to the nation-state herself! We have to maintain a "voice", otherwise, the nation-state's distinctive voice, will loose power and then, only a few will be heard. And just as the individual without any "voice", the minority position, power will win over and enslave all of us!