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 ZiglarI have always said that everyone is in sales. Maybe you don't hold the title of salesperson, but if the business you are in requires you to deal with people, you, my friend, are in sales.
Zig ZiglarMost people consider me an optimist because I laughingly state that I would take my last two dollars and buy a money belt.
Zig Ziglar