Nick Smith

The claim that the citizen's duty is to “persuade or obey” the laws, expressed by the personified Laws of Athens in Plato's Crito, continues to receive intense scholarly attention. In this article, we provide a general review of the debates over this doctrine, and how the various positions taken may or may not fit with the rest of what we know about Socratic philosophy. We ultimately argue that the problems scholars have found in attributing the doctrine to Socrates derive from an anachronistic and erroneous understanding of Socrates as a kind of libertarian.

In vertebrates it is often found that if one considers a group of genes clustered on a certain chromosome, then the homologues of those genes often form another cluster on a different chromosome. There are four explanations, not necessarily mutually exclusive, to explain how such homologous clusters appeared. Homologous clusters are expected at a low probability even if genes are distributed at random. The duplication of a subset of the genome might create homologous clusters, as would a duplication of the entire genome. Alternatively, it may be adaptive for certain combinations of genes to cluster, although clearly the genes must have duplicated prior to rearrangement into clusters. Molecular phylogenetics provides a means to examine the origins of homologous clusters, although it is difficult to discriminate between the different explanations using current data. However, with more extensive sequencing and mapping of vertebrate genomes, especially those of the early diverging chordates, it should soon become possible to resolve the origins of homologous clusters. BioEssays 21:697–703, 1999. © 1999 John Wiley & Sons, Inc.