What are some differences between the ‘American’ and ‘European’ schools of thought? The labels ‘American’ and ‘European’ are highly misleading actually, but to use them in the vague and undifferentiated way which they customarily are, one could say that the beliefs propagated by Jensen represent a mixture of turn-of-the-century (and somewhat judgmental) notions of pigmentation and iris color published by Felke, Liljequist, Thiel, Lane, Kritzer, and other Germans, along with (more …