The document discusses how negative thoughts and behaviors can spread from person to person much like a virus or wildfire. Originally, people were happy and had positive thoughts, but one person developed a bad thought that spread and affected others. Now, the world faces issues like terrorism, poverty, and corruption due to the spreading of negativity over time from one person to another in groups and across societies. The conclusion asks if people can work to spread more positive thoughts and behaviors to counter the negativity and restore greater happiness.