Part of Speech: Noun
Definition: Harmony
Source: http://www.merriam-webster.com/dictionary/concord
Encountered: In the article “The Things They Carried” by Tim O’Brien. “In the midst of evil you want to be a good man. You want decency. You want justice and courtesy and human concord.”
Understanding: I understand what he’s explaining a soldier wants after a violent firefight. He has a new view on life, a immense pleasure of aliveness, and hopes for harmony.
What is it that a soldier wants? It’s not clear from your explanation how understanding concord makes the passage make sense.