Parallel lines in life,divergent lines in science: Complexity encompasses different worlds

This paper has two major parts. The first recounts the beginning and growth of the friendship between Siegfried Streufert and Peter Suedfeld, who in the mid-1960s were graduate students in Harold M. Schroder's social psychology laboratory at Princeton University. Each continued to develop a different line of theory and research on cognitive aspects of personality and social psychology while maintaining their contacts and friendship. The second part describes the background, characteristics, and applications of the integrative complexity (IC) work of Peter Suedfeld and his collaborators and students.