What was the first stucture every built to be perfectly algined with the points of the compss

Need ! how did sumner define liberty in the book of "voices of freedom"

What is human effort in human effort economics

The plantation economy in the south produced a. equal opportunity for all whites and no illiteracy. b. low profits despite the enslavement of a great number of people. c. great profits and developed great educational institutions. d. great profits at the expense of cultural development and equal opportunity.