What social effects have resulted from population growth during the 20th and 21st centuries?

The president has what role as the head of the armed forces 1.commander 2.general in chief 3.commander in chief 4.chief petty officer 5.joint chief

Which amendment best addresses the fears of the federalists like james madison,that rights and powers not specifically listed in the consttuition or bill of rights will not be protected in the future

Which russian tsar transformed thr royal residence in st. petersburg, the hermitage, into a center of culture, painting, and the performing arts