There are people who will go to great lengths to make others emotionally unstable as a means of hiding their own emotional frailty and insecurity.

These people usually have one dominant tool they use in their efforts. Naturally, it is sex or violence. A level above what is natural, in our capitalist society, it is usually money.

On the macro scale, there are organizations and nations that will go to great lengths to make other organizations and nations unstable as a means of hiding their own instability. At this scale the main tools are usually violence and money.