This paper represents analysis of an iceberg of scientific research on the earliest American prehistoric settlements of the Southeast, scoped through the planner's point of view, rather than archeological or anthropological one. Numerous types and sizes of settlements were discovered searching and evaluating existing archeological and anthropological data which were compared with the author's personal observation and experience while visiting some of the existing locations. Despite the fact that these cultures had no written or mathematical skills, the research shows the astonishingly high level in planning and design of settlements and earth structures, which in most cases was related to observation of astronomical phenomena. AMERICAN PREHISTORY AMERICAN SOUTHEAST MOUNDBUILDERS MOUNDS NATIVE AMERICANS Ovaj je clanak dio rezultata istrazivanja provedenih na temu nastanka prapovijesnog americkog grada, a koja je dosad ponajprije bila tema arheoloskih i antropoloskih istrazivanja. Pomnom obradom i vrjednovanjem dostupnih podataka i obilaskom samo dijela od jos uvijek postojecih prapovijesnih lokacija jugoistocnoga dijela SAD-a utvrdeni su brojni oblici i velicine prapovijesnih naselja i pratecih struktura kojih se vrijeme nastanka proteze sve do nekoliko tisuca godina prije nove ere. Rezultati ovoga istrazivanja pokazali su, unatoc nepostojanju pisma, visok stupanj promisljanja i planiranja prapovijesnih naselja i ostalih struktura, koje se u najvecem broju slucajeva zasnivalo na astronomskim promatranjima. AMERICKA PRAPOVIJEST AMERICKI JUGOISTOK GRADITELJI ZEMLJANIH HUMAKA ZEMLJANI HUMCI STAROSJEDITELJI AMERIKE