USA expanded into foreign investment and production in countries abroad. E.g., value of its exports rose from $1,495,616,000 between 1903 and 1905 to $2,441,252,000 between 1911 and 1915. It also, however, became involved in economics of both developed and developing countries. In 1950, historian William A. Williams argued that the need for markets was prime motive for foreign expansion. The need to protect investments and prevent too much foreign competition saw the USA sig extend its roles overseas.