Figure 1. An interim schema for Darwinian phylogenetics. The directional arrows indicate the causal interdependency of the first three domains for both generating data and testing hypotheses. Note that, although the interrelationships for the first three domains are really "temporally-looped," they are not circularly dependent on Domain 4, which is to be derived from them. The direction of arrows indicate the domains, databases, and tested hypotheses within these domains against which other hypotheses are tested.