XX–VIII . 9 . . . 212. 10 . . . ., 1956. . 342. 11 . . . . . 76. 12 . . . .; ., 1945. . 270. 13 – . . // 4. . 6–17. 14 . . . ., 1973. . 405–409. 15 . ., . . ( , , 1978. 16 . . . ., 1966. . 206–207. 17 . . . ., 1980. . 39. 18 Kruisinga E., Poutsma H., Curme G. English Grammar. N. Y.; L., 1947. . 115. 19 . . II . . . ., 1949. . 17–18. . . . - , 1954. , 1957. ). : . . . XX–VIII . – , . . . . . . . , VIII . . XX– . . : , , , , , . The author of the article views the problem of influence of Thessaly’s geographical isolation on the social, economic and political processes that were taking place in this territory in 20 th–8th centuries B. C. Key words: Thessaly, tetrad, sociogenesis, Thessalic union, tagus, ethnos. ( ) - , . . , - , , , , . , , , , . , . 181 - , , XVII . - , - . . . XIV– III homo sapiens . . . . 15 , . , , - , - , , . . . . , , , , , - - . . . III – - . II , , . , - , « », – . , , , - . , , , « », . , - . - - . , , , , - . . - . , . , – , , , - . , – - . 182 , - XX–VIII : : , . , , . , , . - , , , . . , . . , , . XX–VIII . . . - , . , , . , - . , , . : – , , , , , , , - . . - , , , , . , . - , - , , . XVII . . . , . - . . , « » , . , , - . , , , VIII . , - - . ., , , . 183