Goudy compared letters are organisms and typefaces to species and classified them similar to biological taxonomy.

evolution-of-type18

evolution-of-type1

evolution-of-type3

evolution-of-type5

evolution-of-type17

evolution-of-type2

evolution-of-type7

evolution-of-type8

evolution-of-type11

evolution-of-type12

evolution-of-type14

evolution-of-type15

evolution-of-type16