Adam Smith, Thomas Malthus, and Karl Marx are best known for their *

 Both believed that the lowest social class would always be poor. Both thought that the population increased faster than the food supply.

Explanation: because They first met in 1811, Malthus was a leading economist at that time while Ricardo was a man of property.

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.

i think it’s a i hope that right : )