What is the relationship between the field of science and the philosophy of dialectical materialism in the Soviet Union? Ninety-five per cent of the fears and misgivings expressed by American writers in regard to this subject are quite unwarranted. They have been arrived at, not by any use of the scientific method of carefully examining observable facts, but by accepting the superficialities and distortions of the sensational press, and by making sweeping "deductions" from wholly unverified premises, or from isolated and exceptional instances. Some scientists who would not dream of approaching their own field of specialty in any such manner apparently feel that the complex problem of the relations between science and a certain philosophy within a new society can be so approached. It is clear upon reflection that anyone who wants to deal seriously with this question, or to express himself with any degree of competence upon it, must study carefully the philosophy in question, and undertake a comprehensive scholarly examination, or avail himself of the data of others who have made such an examination, of the actually operative facts on a large social scale, and in some detail. The attitude, for example, that dialectical materialism is not worth any serious study is hardly compatible with the claim to possess any serious views as to its possible relationship to science. Having mentioned certain prerequisites, the present writer may as well make immodest haste to say that he has at least tried to satisfy them by learning the Russian language, examining in detail the historical development of the philosophy of dialectical materialism, and spending the major part of two years in independent investigations in the U.S.S.R., as Cutting Travelling Fellow of Columbia University. While the Soviets have made various mistakes in the handling of certain problems, the over-all picture is so much better than we have ordinarily been led to believe, that our general thinking on these matters must undergo basic modification to come within hailing distance of the existing facts. The following answers to a few key questions frequently raised by scientists in this country will epitomize some of the findings, as they bear upon the theme before us today. Question 1: What is the actual relationship between the scientific method and dialectical materialism? The relationship is this: dialectical materialism in one of its parts tries to explain what the scientific method is, tries to develop an adequate theory regarding the nature of this method. Certainly very few of us here present will imagine that it is not necessary to do this, or that it is an easy matter. In reality, of course, it is a very difficult problem to state fully and exactly the premises, procedures, underlying conditions and leading implications of this method. Aristotle tried to do it, Francis Bacon tried to do it