One might argue that of all the different approaches to botanical classification, phenetics was the strongest departure from the past. Biology became more quantitative starting in the 1950s, accompanied by the discovery of the structure of DNA, and this led to revolutions in all areas of science. Phenetics attempted to put biological classification on a quantitative, objective, and repeatable basis. To do this required a cost: the ignoring of phylogeny, which was regarded as too speculative. This rejection was never fully accepted by the community, and it eventually led to the development of cladistics. Furthermore, because of numerous parallelisms among angiosperms, phenetics never resulted in a new, accepted, comprehensive classification of flowering plants.