taxonomy (n.)

“science of classification,” 1819, from French taxonomie (1813), coined irregularly from Greek taxis “arrangement” (see tactics) + -nomia “method” (see -nomy). Related: Taxonomic; taxonomist.

tactics (n.)

1620s, “science of arranging military forces for combat,” from Modern Latin tactica (17c.), from Greek taktike techne “art of arrangement,” noun use of fem. of taktikos “of or pertaining to arrangement,” especially “tactics in war,” adjective to taxis “arrangement, an arranging, the order or disposition of an army, battle array; order, regularity,” verbal noun of tassein “arrange,” from PIE root *tag- “to touch, handle.”

Carolus Linnaeus, an eighteenth-century Swedish naturalist, was among the first scientists to sort and categorize human beings. He regarded humanity as a species within the animal kingdom and divided the species into four varieties: European, American, Asiatic, and African.

https://www.facinghistory.org/holocaust-and-human-behavior/chapter-2/science-race