1. One of the methods by which post-Civil War business leaders increased their profits was: increased competition. supporting a centrally planned economy. funding research on new technologies. elimination of as much competition as possible and replace workers with new efficient machines. to call for a corporate income tax created by Republicans in Congress.

1. One of the methods by which post-Civil War business leaders increased their profits was: increased competition. supporting a centrally planned economy. funding research on new technologies. elimination of as much competition as possible and replace workers with new efficient machines. to call for a corporate income tax created by Republicans in Congress.