Hi there was a nice featured article in wikipedia about emigration of swedish people to usa. During the 19th and early 20th centuries, about 1.3 million Swedes left Sweden for the United States of America. huge outflow of the population was causing national alarm in Sweden. A broad-based parliamentary emigration commission was instituted in 1907. It recommended social and economic reform.
two major inflows of immigrants into tamil nadu that i can recall are the saurashtrians in 1200s and the telugus in 14- 16 centuries.
can we discuss the reasons and impacts of these and ( other ) populations into tamilnadu during historical times.