I thought your username implied you had been to university. Your curriculum must have been purely mathematically based. Didn't you take any history classes? - yes, I've been to (and graduated from) uni.
My curriculum was biology based. We humans (Homo sapiens) are animals, primates. Human evolution, anatomy and behaviour were introduced and explained to some degree.
I have no qualifications in history (I dropped the subject and chose Geography instead for GCSE) but I am a keen learner and student of history.
Like you, I like to put things into perspective. Perspective is very important.
For instance, roughly about the same time as Chinaman was popular and acceptable throughout western countries, Japanese soldiers were massacring and raping Chinese people in Nanking. There's a little bit of perspective for you.
And today, with all the problems Australia faces, the Racial Equality Commissar latches onto the word Chinaman, as if this is a serious problem ... more perspective.