What was the name given to the belief that life is made up of competitive struggle and only the fittest survive?

mesopotamian code of hammurabi

and i think its 1860 b.c. you mean lol

accomplishment : zachary taylor’s was a national war hero in his battle in an mexican war

explanation:

he was known as a national war hero for his battles in the mexican war, taylor was elected as the 12th president of the united states in 1849. he led the nation during its debates on slavery and southern secession. after serving only 16 months in office, taylor died from cholera morbus on july 9,