This paper addresses the factors that give rise to both heterogeneous and homogeneous opinion distributions within political communication networks. We argue that the factors sustaining homogeneity and heterogeneity are not entirely symmetrical – heterogeneity is not necessarily explained by treating it as the flip side of homogeneity. Two primary questions guide the effort. If influence within a dyad depends on the distribution of opinions beyond the dyad, is dyadic influence contingent on the construction of the network within which the dyad is located? In particular, how does the micro-structure of the larger network affect the persuasiveness of communication within the dyad? We pursue an analysis based on agent based models of the communication process. The analysis points toward the importance of particular forms of small scale organization in preserving homogeneous opinion distributions. Homogeneity is more likely when network density is particularly high – when direct connections are more frequent among more agents. Correspondingly, when we observe homogeneity within communication networks in the natural world, the organization and reach of small scale social organization is likely to be key.