What engineering advances have been found in the ruins of indus valley civilization

Ruins of settlements in the Indus Valley show that the buildings were constructed of Baked Bricks.  The Indus and the Ganges links the middle of the subcontinent with the sea-Indus and Ganges = a fertile plain across north India-The central part of India: Deccan Plateau, with mountains to the east and the west. Dry region

the influence of charles louis de secondant , baton montesquieu.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.