This collection of eighteen papers explores issues in the study of semantic parallelism — a world-wide tradition in the composition of oral poetry. It is concerned with both comparative issues and the intensive study of a single living poetic tradition of composition in strict canonical parallelism. The papers in the volume were written at intervals from 1971 to 2014 — a period of over forty years. They are a summation of a career-long research effort that continues to take shape. The concluding essay reflects on possible directions for future research.