F.A. Mann is considered to be one of the finest British lawyers of the twentieth century, esteemed as an international jurist and as a practising solicitor. He combined a thriving and prestigious practice with a prolific output of writing and teaching, with much of his work centering on the inter-relationship of international and national law. This collection, first published in 1973, brings together twenty-one of his essays covering a range of issues that are still relevant today, including the doctrine of jurisdiction, state responsibility, corporations and international law, and arbitration.