This demand for the freedom of scientific research and for independence of thought, this organisation of young intellectuals for the defence of a right so essential and hitherto so incessantly violated, seem to me matters of primary necessity. If you desire that the cooperation between the teachers in different countries should not remain purely speculative, it is not enough that the teachers should associate their efforts. It is further essential that their thoughts shall be able to spread freely and to fructify in the minds of the young intellectuals throughout the world. Let us have no more of these barriers erected by the states between the two classes, between the two ages, of those who are engaged in the search for truth--teachers and students. * * * * * My dream goes further. I should like the seed of universal culture to be scattered, from the very beginning of education, among the pupils of the primary and secondary schools. Above all let me suggest that throughout the countries of Europe an international language should be one of the compulsory subjects of study. Such international languages (Esperanto, Ido) have already attained something very near perfection; and with the minimum of effort the international language could be mastered by all the children of the civilised world. Not merely would this language be of unrivalled practical value throughout life. It would further serve as an introduction to the study of foreign languages and of their own national tongue; for it would make them realise, far better than any express instruction, the common elements in the European languages and the unity of European thought.