I wouldn't say 'most' people are prone to negativity. I think it's probably that most people allow negativity to color their thinking, depending on circumstances, but I also believe most people make the necessary efforts to return to positive thinking as quickly as possible.
Zig ZiglarThe chief cause of failure and unhappiness is trading what you want most for what you want right now
Zig ZiglarWhen a company or an individual compromises one time, whether it's on price or principle, the next compromise is right around the corner.
Zig Ziglar