It seems to me that the history of biological systematics/taxonomy is a great source of material for a study on dissolving the question (but I am neither a systematicist nor a historian). Are there any popular intros into the field that don't focus on individual botanists of the past? Serebryakov's "Morphology of plants", printed half a century ago, has a nice section on history, but it is limited in scope (and not quite "popular"). Other books often just list the people and what they did without interconnecting them, which is boring.