Entrepreneur Mark Cuban, the owner of Dallas Mavericks, stars on ABC’s “Shark Tank” (the best show I have watched till date) also meriting an estimated $3.9 billion. The shark doesn’t just point to work ethics and negotiation skills when it takes to succeed in business.

As the Shark reported Vanity Fair in a 2018 interview with the “Shark Tank” cast: “One of the most underrated skills in the business right now is being nice. Nice sells.” This proves the shark not only points to work ethics but also a pure skill that anyone can develop can go a long way.

He further elaborated: “I went through my metamorphosis, really if you will. Early on in my career, I was like bam, bam, bam, bam, bam — I might curse. I might get mad. And then I just got to the point — I wouldn’t have wanted to do business with me when I was in my 20s.

“And so I had to change, and I did, paid off.”

Claiming the sharks’ intellectual point, science backs him with claiming soft skills can boost your career. As studies will help you to test your level of EQ which can make you wealthy and successful.

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As global career development expert Soulaima Gourani explains CNBC Make It, what makes you most important is your ability to cooperate and unite with others: “A lot of jobs are going to disappear, but the thing that we will always have that is more important is your emotional intelligence.” She defines that as having a “good mentality of yourself, self-control, empathy and a natural understanding of people’s decisions, needs, and desires.”

Gourani continues: “If you can handle people’s diversity — people of a different age, different personalities, or educational backgrounds, for example — and you can handle the conflict that comes with that, you will be the highest paid, a most valuable employee in the company.”

To cut it short, at the end of the day, “people hate dealing with people who are fools,” Cuban inscribed in a 2014 Entrepreneur article. “It’s always easier to be nice than to be a jerk. Don’t be a jerk.”