study text/language

Federal Headship vs. Corporate Solidarity in Romans 5:12

A while ago, I shared some rambling thoughts on Romans 5:12 trying to decide how Paul envisions our relationship to Adam: is it akin to that of a Federal Head (whereby he acts as a representative for the whole within a covenantal situation and the whole’s decision is subsumed in his action) or to that of Corporate Solidarity (whereby people identify and unite in the way an individual, head of the family, leader—whatever—acts ).  In this post I want to see how people have assumed one view and point out where I think the text leans.