The economy and foreign policy are both sources of conflict.
But that was the greatest source of conflict in the world today.
"It's a different situation and something that is another source of conflict."
In 1660, the shared land became a source of conflict between them.
Certainly there is nothing wrong with physical action as a source of conflict in a story.
The struggle over land resources was one source of conflict.
Now, the rubble itself is a new source of conflict.
Even the study's methodology could provide a source of conflict.
But it still would represent a potential source of political conflict.
Water is often a source of conflict between countries and peoples.