lfc, I myself don't believe on knowledge constructed by society, instead, it is real and we are trying to know what's that and how we know that that is truth. anyway,here is just a start - http://www.constructivism123.com/What_Is/What_is_constructivism.htm more essays: - http://www.towson.edu/csme/mctp/Essays.html you can go through Stanford Encyclopedia of Philosophy and search how knowldge is constructed by perception or so so - http://plato.stanford.edu/contents.html#c if you need more about philosophy on knowledge as a social construction, please google bruno latour (he is one of the constructivist of this time), and constructivist approach. - http://plato.stanford.edu/entries/epistemology-social/