This is one of the most absolute verses in the Bible. It uses the word "only" (or "solely").
The Exclusive Source
Solomon doesn't say pride is one of the causes of fights; he says it's the sole root cause. Whenever there's a heated dispute, there's a wounded ego or an ego trying to assert itself. "I'm right," "You don't respect me," "My way is better." If there's humility on one side, the argument turns into dialogue. If there's pride, the dialogue turns into war.
The Fool's Deafness
The proud person doesn't listen, he just waits for his turn to speak (or shout). He's already decided he knows everything. That's why the fight continues: because nobody is listening, only defending territory.
The Wisdom of Listening
The cure for conflict is the humility to ask for and accept advice. Whoever takes advice admits: "I could be wrong" or "I'm not seeing the whole picture." That posture disarms the opponent and invites wisdom to the table.
“Good to Great” — Jim Collins
The leaders who drove their companies to failure shared one trait: a giant ego. They didn't listen to advice, ignored the brutal facts, and did everything "their way" (pride). That generated internal disputes and bad decisions. Level 5 Leaders, on the other hand, were humble. They created an environment where the truth was heard (they took advice from the team and the data), and that's why the company won without ego battles.
“Especialista em Pessoas” — Tiago Brunet
The biggest barrier in relationships is the need to be right. Brunet teaches that "having peace is better than being right." The proud person wants to win the argument but loses the friend or spouse. The wise person takes advice, yields when necessary, and wins the person.
In Philippians 2, Paul tells us to do nothing out of "selfish ambition or vain conceit" (pride), but in humility, considering others as more important. Jesus is the supreme model of this.
At the Last Supper, while the disciples were arguing about who was the greatest (pride generating a fight), Jesus took a towel and washed their feet. He ended the argument not with a shout, but with an act of extreme humility. Where Christ is, pride leaves and the fight ends.