Who is lin referring to when he says the barbarians?

just search google

explanation:

google is the best

answer; ///it examines the interaction between genetics and culture in shaping human biology;

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.