In his work with the yanomamo, chagnon traded manufactured goods like matches, fish line, axes, and machetes. does this change a culture? should he have traded tools/weapons with a culture known as "the fierce people? "

Yes, these items change a culture.

As a researcher, Chagnon was studying the "fierce people". His research revealed his perceptions of a tribe characterized as uncivilized and barbaric. He introduced new technology into the culture which did change the culture of the group.

Any new technology or material culture items introduced into a society will change the overall culture. The Native American tribes in the US experienced cultural change when horses were introduced for hunting and guns were introduced for hunting and war. When new technology is introduced to any culture whether from the outside or in, cultural change will occur.

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.

abraham lincoln