Discord is a great word that has made many tribes fight against each other. Many life's has gone just because of misunderstanding and disagreement.
Have heard of a two small town when I was very young, they were both fight for land the first king insisted that the boundary extend to a particular place while the other king went against him. In a situation where by the leaders are not united, having grudges, directly or indirectly they are giving room for people under them to stir up war.
That was how the two towns started fighting each other with the use of charm, gun and other kind of olden days weapons.
Discord is all over the world not only within two towns or unbelievers alone. In other countries especially Nigeria, Baptist church members can't marry another church, every leaders in the church are imposing that on their members just because they don't want to loss their members to another church just inform of match making in the church that why many ladies would say: i can't marry any member from another church.
Have even met a lady that we both had discussion she was like, I can't just date you, she was referring to me just because of church dultry and we are all serving the same God.
Moving round the world, let's talk about sports, football as a case study.
The Manchester united fans and Liverpool together with Manchester city don't like themself that why they call them rival they don't sell players to each other.
Many of Manchester united posted before the decision of Cristiano Rolando to Manchester united that hadn't been he left Juventus for Manchester city, they would unfollow him on Instagram that's to show how discord move around the world.
Discord started from every one's family before expanding to the world generally, when fish decays it start from the head.