Who was one of the first people to state that matter is made up of atoms

Democritus of Ambera

He was a Greek philosopher in 400BCE. The Democritus Theory (aka, atomic theory), was subsequently named after him.  

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.