Haas received his cum laude baccalaureate degree from Stanford University in 1959.

During his last year of work on his doctoral degree, he taught temporarily at San Jose State University from 1963 to 1964.

His research appointments include a United Nations Institute for Training and Research (UNITAR) consultancy at the United Nations Economic and Social Commission for Asia and the Pacific in Bangkok during 1971 and a Fulbright Research Fellowship at the Institute of Southeast Asian Studies on the University of Singapore campus in 1987.

In December 2008, he resigned from his latest teaching position to complete George W. Bush, War Criminal?

[1] This book identifies and documents war crimes for which Bush is liable.