Regarding the "instinctive biases". The only past life that I am aware of as of now was one as a Jewish man in 17th century Germany. However, I am almost certain that I was a convert to Christianity and that my wife wasn't Jewish. I do recall kind of having a special fascination and sympathy towards Jewish culture long before I was even aware of this life.
P.S., APHG! I haven't thought of that class in a very long time, I took it as a freshman as well but it's been about eight years since then.