What effect did these alliances have on the possibility of war.

Pluralist Theory is a theory which states that a mass of groups can bring change or impact policies of the USA, instead of only one party or group. The second citizen is saying exactly that, he claims that many different perspectives of competing groups will bring about only policies acceptable to a consensus of the citizenry. So, we can conclude from his beliefs that the second citizen believes in the political theory of Pluralist Theory.