Also academic literature could be entertaining:

“Even constructivism is often viewed as a theory of global peace and harmony, but it should, and can, explain both cooperation and conflict” (Acharya, 2009, p. 39)

Acharya, A. (2009). ‘Constructing a security community in southeast Asia : ASEAN and the problem of regional order’ (2nd Ed.), Routledge, London.