Need, greed and fear are the three factors that runs most of the business and humansNeed, greed and fear are most common factor in most of humans and businesses. Usually, humans used to work to fulfill his basic needs of food, shelter, and home. Greed and fear factor were earlier too but when I tried to match it with business, then I found a lot many business that are run on these things only.
Need-based business/sectors: Agriculture and allied services
Greed-based: Drugs, betting, smuggling, etc.
Now many more and most of the business and services can be categorized in these broad categories and few may not fall in them. Now, even need-based business are manipulated and adultration, use of chemicals, fake products and lot more things are done out of greed to earn quick money.
Members can add what they think what business will fall under such categories and ofcourse humans run these business so they themselves are bound within these categories.