This article is guided by several premises. First, community coalition
s fit with a social ecology perspective of health promotion because th
ey work with multiple domains and promote community change. Second, th
e community context affects the functioning of coalitions. Third key l
eaders are an important part of the social fabric of a community and i
nfluence the social ecology of a community; therefore a coalition shou
ld include key leaders and influence them and their organizations. The
purpose of this article is to advance an understanding of the social
ecology of coalitions by describing concepts, variables and results fr
om two national studies and by providing anecdotal evidence and a meas
ure of key leaders from our own work. After briefly defining and descr
ibing community coalitions, we: (1) review literature on contextual va
riables and community coalitions, (2) provide examples of contextual v
ariables influencing community coalition development, and (3) discuss
the relationship of key leaders in multiple domains and community coal
itions. The article concludes with a discussion of the need for a fram
ework of contextual variables and a promising next step.