Final answer:
The Vietnam-American War had significant effects on the United States, shaping its foreign policy, domestic politics, and leading to protests. Anthropologists paid more attention to ethics due to the controversial nature of the war.
Step-by-step explanation:
The Vietnam-American War prompted anthropologists to give serious attention to the issue of ethics.
The war had significant effects on the United States and its people, leading to changes in foreign policy, loss of consensus and confidence in the government, and shaping domestic politics.
The war also sparked controversy and protests, with differing interpretations of its outcome and calls for attention to inhumanity and incongruities. These factors led anthropologists to reflect on the ethics of their research and consider the voices and perspectives of marginalized groups.