OUR SELF

In the end, the first person you need to make happy is yourself. If you aren't happy yourself, it becomes hard to make other people happy, and this can be quite a vicious cycle. People are way too fearful of what other people think of them, and way too attached to material objects. Material wealth doesn't matter, and it can never make you truly happy.
In the end, you should "simply" work on being the best possible version of yourself, as that is all you can do. If we are all a better version of ourselves tomorrow, than we are today, the world is bound to grow better.
of course, what is "good" is subjective....