collected", and "to prepare an education campaign based on this information." Before undertaking this campaign, the scientific position had to be clarified. Furthermore, in doing this The introduction stated "Knowledge of the truth does not always help change emotional attitudes that draw their real strength from the subconscious or from factors beside the real issue." But it could "however, prevent rationalizations of reprehensive acts or behaviour prompted by feelings that men will not easily avow openly." UNESCO made a moral statement: UNESCO would start a campaign to spread the results of the report to a "vast public" such as by publishing pamphlets. It described Brazil as having an "exemplary situation" regarding race relations and that research should be undertaken in order to understand the causes of this "harmony". Criticism and controversy Despite the introduction stating that "The competence and objectivity of the scientists who signed the document in its final form cannot be questioned", the first version of the statement was heavily criticized. A revised edition in 1951 explained the controversy as "At the first discussion on the problem of race, it was chiefly sociologists who gave their opinions and framed the 'Statement on Race'. That statement had a good effect, but it did not carry the authority of just those groups within whose special province fall the biological problems of race, namely the physical anthropologists and geneticists. Secondly, the first statement did not, in all its details, carry conviction of these groups and, because of this, it was not supported by many authorities in these two fields. In general, the chief conclusions of the first statement were sustained, but with differences in emphasis and with some important omissions." Some examples of differences include that the first version argued that there was no evidence for intellectual or personality differences. The revised version stated that "When intelligence tests, even non-verbal, are made on a group of non-literate people, their scores are usually lower than those of more civilised people" but concluded that "Available scientific knowledge provides no basis for believing that the groups of mankind differ in their innate capacity for intellectual and emotional development." The first version did not reject the idea of a biological basis to racial categories. It defined the concept of race in terms of a population defined by certain anatomical and physiological characteristics diverging from other populations; it gives as examples the Caucasian, Mongoloid, and Negroid