For at least two generations now the serious-minded European theatre has existed in an era of experimentation. The diverse experiments have not as yet produced any unequivocal, clearly discernible results, but the era is by no means at an end. It is my opinion that the experiments followed two separate courses, which, though they occasionally intersected, can, when separated, be individually pursued. These two courses of development are distinguished from one another by means of their individual functions: entertainment and instruction, that is to say, the theatre organized experiments which were to increase its powers of entertaining, and experiments which were to increase its powers of instruction.

In a world as fast-moving and dynamic as ours the enticements of entertainment are quick to wear out. We must always be prepared to meet the desire for progressive public stupefaction with new effects.