The modern man wants joy and peace. He needs several things to live, live well and live joyously. In his attempts to get what he wants, he often performs various actions, the far-reaching effects of which he does not have an idea. If he knows better, he can properly assess and evaluate before plunging into the field of action, thus saving himself from much trouble and tribulation. This knowledge, only philosophy can give. None of the material sciences deal with it.
It is not work that kills a man, nor even scarcity, but harshness and unethical behavior that destroys him.
Desire is not a need but a demand for something beyond the need.