NO. 1 CULTURAL DEVELOPMENT IN LATIN AMERICA 145 
modification, into the fabric of New World culture. The more we learn 
about the archeological picture, the more apparent it is becoming that 
the 20th century has brought no real revolution in lessening the isola- 
tion between people and places ; on the contrary, it can be truly said 
that for many thousands of years our ancestors have lived in a "small 
world." 
REFERENCES 
Platt, Robert S. 
1942. Latin America, countrysides and united regions. New York. 
Sauer, Carl O. 
1952. Agricultural origins and dispersals. Amer. Geogr. Soc. New York. 
WiLLEY, Gordon R. 
1961. New World prehistory. Ann. Rep. Smithsonian Inst, for 1960, pp. 
551-575. 
