1. Adler, M.J. How to Think About War and Peace (New York: Simon & Schuster, 1944).
2. Aldobrandini, G. The Wishful Thinking. Storia del pacifismo inglese nell’Ottocento (Roma: Luiss University Press, 2009).
3. Allan, P. and A. Keller, eds. What is a Just Peace? (New York: Oxford University Press, 2006).
4. Altieri, R., ed. Pacifismo e nonviolenza (Pisa: Centro Gandhi Edizioni Plus, 2003).
5. Anta, C.G. Albert Einstein: The Roads to Pacifism (Oxford: Peter Lang, 2017).