The Biological Journal of the Linnean Society publishes papers concerned with the process of organic evolution in the broadest sense. It particularly welcomes contributions (up to a maximum of 12 000 words) that illustrate the unifying concepts of evolutionary biology with evidence, either observational or theoretical, from any relevant field of the biological sciences. Potential authors should be aware that papers on specialized subjects are discouraged. The Biological Journal succeeded (in 1969) the Proceedings of the Society, the journal in which Darwin and Wallace published their seminal papers in 1858.