the more powerful form of bridging social capital. Bonding and bridging social capital can work together productively if in balance, or they may work against each other. As social capital bonds and stronger homogeneous groups form, the likelihood of bridging social capital is attenuated. Bonding social capital can also perpetuate sentiments of a certain group, allowing for the bonding of certain individuals together upon a common radical ideal. The strengthening of insular ties can lead to a variety of effects such as ethnic marginalization or social isolation. In extreme cases ethnic cleansing may result if the relationship between different groups is so strongly negative. In mild cases, it isolates certain communities such as suburbs of cities because of the bonding social capital and the fact that people in these communities spend so much time away from places that build bridging social capital. Accessibility Edwards and Foley, as editors of a special edition of the American Behavioral Scientist on "Social Capital, Civil Society and Contemporary Democracy", raised two key issues in the study of social capital. First, social capital is not equally available to all, in much the same way that other forms of capital are differently available. Geographic and social isolation limit access to this resource. Second, not all social capital is created equally. The value of a specific source of social capital depends in no small part on the socio-economic position of the source with society. On top of this, Portes (1998) has identified four negative consequences of social capital: exclusion of outsiders; excess claims on group members; restrictions on individual freedom; and downward levelling norms. In political institutions Social capital (in the institutional Robert Putnam sense) may also lead to bad outcomes if the political institution and democracy in a specific country is not strong enough and is therefore overpowered by the social capital groups. "Civil society and the collapse of the Weimar Republic" suggests that "it was weak political institutionalization rather than a weak civil society that was Germany's main problem during the Wihelmine and Weimar eras." Because the political institutions were so weak people looked to other outlets. "Germans threw themselves into their clubs, voluntary associations, and professional organizations out of frustration with the failures of the national government and political parties, thereby helping to undermine the Weimar Republic and facilitate Hitler's rise to power." In this article about the fall of the Weimar Republic, the