Aggression is completely normal emotion and has helped humanity to evolve in certain circumstances. Aggression stems from the perceived fear of threat. If someone feels threatened, frustrated, irritated, disrespected, they retaliate with aggressive behavior. Normally people behave aggressive when they do not have control over their emotions to analyze what they should do if they are under attack.
In this competitive world, where almost everyone is in a rush to get ahead; acquire more and more material possessions, being aggressive has been a normal personality trait; considered a sign of being strong. People generally do not take out time to work towards having control over their emotions and obtain peace of mind. Whenever their ego in under threat, they feel it is normal to behave aggressive no matter what are the consequences that they may regret later.
If you push over your point of view aggressively to someone, the chances are that they would feel threatened, stand up for themselves, and become aggressive as well. In that sense aggression is contagious because the propensity to act aggressively under threat is inbuilt. By acting aggressively people ruin their relationship, reputation, and even they end up in prison. So it is wise to overcome aggression to save yourselves from the many unwanted troubles in life. Here are a few tips that you may find it useful to get over aggression.