A r'al analysis of 22 quantitative variables was applied to a sample of 95 communities (drawn at random out of 1,014 communities in the Netherlands) in order to determine the main structural variables & the structural is of pol'al radicalism. The latter was indicated by the % of votes for the radical leftist parties & for the Boeren Party, a rightist radical party. In addition to 2 factor-analysis programs (with the standardized Varimax & Promax rotations), a new program for the computation of high-order partials was applied to the matrix of 22 inter-r'ed variables. Results were analyzed along the lines devised by H. M. Blalock for the causal inferences from nonexp'al res. Findings indicate an intensive association of secularization with pol'al radicalism & a high inter-connectedness of various indicators of leftist radicalism. Another cause may be seen in industr'ism (earlier industr'ization) which is, in its turn, r'ed with initially lower income level as resulting from migration of Ls strata to industr'izing communities & from pop surplus (as indicated by large tam size). Both industr'ism & secularization result in a decrease in fam size which opens the possibility of applying the model of cyclical soc change to the present situation in the Netherlands. Contrary to expectation, no positive association could be found between industr'ization or Ur'ization & secularization. Neither community-growth, nor more Sch educ r with radical att's when a more controlled design of study such as this is applied. AA.
