"Aggression unopposed becomes a contagious disease"

In this quote, previous US President Jimmy Carter is warning about the dangers of untreated hostility. He recommends that when aggressiveness is permitted to go unopposed, it can spread like a disease, contaminating others and causing harm. This might be interpreted as a commentary on the importance of standing up against aggressiveness and not enabling it to go uncontrolled. Carter may likewise be recommending that aggressiveness, if left unchecked, can intensify and become a larger problem, just like an infectious disease that spreads and ends up being harder to contain. Overall, this quote works as a pointer of the devastating nature of aggression and the importance of resolving it before it becomes unmanageable.