[Article] The happiest creatures on earth? Adjust Share By Ruth Brecher, Edward M. Brecher, This article is only available as a PDF to subscribers. Download PDF Tags 20th century Animal models in research Behavior modification Brain stimulation Electric stimulation Human experimentation in psychology Medical ethics More from Ruth Brecher The military’s limited war against segregation Ballard vs. the installment Goliaths Adjust Share Close < Previous Issue | View All Issues | Next Issue > April 1961 < Previous Issue | View All Issues | Next Issue > Table of Contents Close