The basis of this classification is increasing volitionalism and particularism. De Greef gives the following classification: economic, industrial, genetic, artistic, scientific, moral, juridical, and political. In holding that the economic elements in society represent the least volitionalism, and the political the most volitional activity, with graded degrees of volitional activities represented by the intermediate factors, the weakness of de Greef’s analysis becomes evident. While an improvement over Comte’s classification and superior to Spencer’s mechanistic order, de Greef’s contribution possesses only a relative degree of logical merit. It is far from being objectively correct, and is indicative of the difficulties in the way of classifying social elements in an evolutionary or filial order. There is no doubt but that any classification of merit would have to be arranged according to some correlative plan, which would serve the purposes of an exhibit but would not be of much scientific value. Moreover, the classifications that are most useful are those classifications of societary forces; these are psychical in nature and have been treated in foregoing chapters. De Greef perceived the importance of the principle of socialization. He emphasized the importance of a “we” feeling in societary life. His social unit is the primitive family. In the evolution from the primitive family and state, the evidence of progress is the degree of “togetherness” that has been developed. De Greef advanced the idea that there is an increasing degree of contractualism and hence of freedom in society. De Greef’s work may be taken as the best attempt to carry Comte’s classification of the sciences to a logical conclusion by furnishing a classification of the elements which function in the field of the “highest” science of all, namely, sociology. At this point and in concluding, the methodology of Albion W. Small will be considered. Professor Small’s other contributions to sociological thought have been indicated at the proper places in earlier chapters. The correct method for pursuing sociological analyses is to treat human society in terms of process. The main current in all sound sociological study is the social process. The significant test of progress in this social process is achievement.[XXVII-2] According to Professor Small’s classification, there are six main phases of social progress, namely: 1. Achievement in promoting health, 2. Achievement in harmonizing human relations, 3. Achievement in producing wealth, 4. Achievement in discovery and spread of knowledge, 5. Achievement in the fine arts, 6. Achievement in religion.