Before revision:  We then show that economic benefits from international trade provide incentives to form alliances in ways that restore stability and prevent wars, both by increasing the density of alliances so that countries are less vulnerable and by removing the incentives of countriesto attack their allies.
After revision:  We then show that international trade induces peaceful and stable networks: trade increases the density of alliances so that countries are less vulnerable and by removing the incentives of countriesto attack their allies.