Social software is any software that supports group communications. The dynamics of social software are significantly different from traditional interactions.
Social Software and the Politics of Groups, Clay Shirky, First published March 9, 2003 on the "Networks, Economics, and Culture" mailing list (http://www.shirky.com/writings/group_politics).
... der Schleiermacherschen Glaubenslehre (1836)
Psychologie oder Wissenschaft vom subjektiven Geist (1837; 3rd ed., 1863)
Kritische Erläuterungen des Hegelschen ...