 The introduction of molecular data was highly significant in phylogenetics. In addition to the amount of data it generated, and the way molecular data provided evidence where other data were scarce, this new type of data was also significant in how it promoted the mathematization of phylogenetics. Molecular data lends itself to mathematical and statistical analysis, in part due to (a) the ease by which molecular data may be encoded; (b) the systematic way molecular evolution may be mathematically modeled and subsequently incorporated into statistical methods; and (c) the manner by which mathematical and statistical tools help analyze the large volume of molecular data under consideration. So though the molecular revolution and mathematization of systematics need not go hand-in-hand, it is hardly surprising that they do.