This article explores nation building as an organizational accomplishment and uses the concept of boundary object to explain how the groups that compose the nation cooperate. Specifically, the article examines the mechanisms devised to secure a flow of money from the Irish-American and Jewish-American diasporas to their respective homelands. To overcome problems associated with conventional philanthropy, Irish and Jewish nationalists issued bonds and sold them to their American compatriots as a hybrid of a gift and an investment. In the Irish (...) case, disagreements about the entitlement to the proceeds resulted in the termination of the bond project. In the Jewish case, the bond served as a boundary object allowing American and Israeli Jews to cooperate despite ongoing tensions. The Israeli bond provided Jewish-Americans with an additional way to invest themselves financially and emotionally in Israel. This bond is an example of a socio-technical mechanism used to create national attachments. (shrink)