Various governments and scientific institutions for over forty years have funded the search for extra-terrestrial intelligence (SETI). Continued public funding is currently under debate. This paper outlines the theoretical paradigm of SETI and current SETI research. It concludes by assessing the current state of the field and concludes that while there is no evidence of extra-terrestrial intelligence (ETI) there is also no evidence against it. Therefore, it concludes, that SETI research is an incredibly important and legitimate field of scientific inquiry that must be funded and pursued. 7 pgs. 14 f/c. 12b.