Answer:
Eugenics
Explanation:
The effort to produce genetically improved humans through selective breeding arose in the 20th century as a way to improve the human race by encouraging the "desired and healthiest" (people deemed the fittest, according to their criteria) to have more children.
On the other hand, the ethical concerns rose since minorities or whole ethnic groups were seen as inferior and undesired to live in the world.
Perpahs the extreme of this came when the national socialist defended with similar arguments the idea of a human species the so-called "Arian race", that would ultimately be free of diseases, disabilities and most undesirable traits that humans were expected to leave behind.
Many of the beliefs of that time have been proben today to be false.
The ancient city of Harappa was considered to be advanced during its time due to multiple characteristics such as: the sheer size of the city (known today as urban); a large network of trade/commerce/transport technology and economy; accuracy of their measurement systems for length and mass; their use of measurements in architectural design, sewerage and drainage systems; innovative metallurgy techniques and manipulation of precious metals (lead, tin, bronze, copper).
The Roman legions, which were columns of roughly five-thousand men a
piece, were greatly beneficial to the Romans because they were able to
maneuver more freely around enemy forces, which were usually condensed
into a single unit.
