The purpose of this study is to compare the relative impact of communication structures and the utility of sixteen sources of orientations in the development concepts related to peace and war among high school students. 197 students from Seattle, Washington and 227 from Vancouver, British Columbia were asked to respond to four open-ended questions on war, peace, and causes of war, and the prevention of war. They were then asked to rate the utility of their sources of information: TV at home, radio, newspapers, magazines, books, movies in theaters, teachers, textbooks, movies in school, TV in school, minister or teacher in church, and content of religion. Statistical analysis utilized a one-way analysis of variance, the dependent variable being the source ratings. 21 of the 64 comparisons had greater utility for the Seattle sample; the print and motion picture sources had greater utility for the Vancouver sample. A clarification of possible causative variables is provided in an interpretive section of the paper. A related document is SO 001 842. (Author/DJB)