Necessity is the mother of invention
When we are in need, we try hard to satisfy it. We devote all our energies to fulfilling the demand and it is often seen that we succeed in our efforts. If one reads the story of discoveries and inventions, one will come across numerous examples to prove the truth of this saying. The primitive man must have found it difficult to eat the flesh of animals that he killed. He must also have found it difficult to keep off cold in the winter without fire because he had no cloth. These two necessities, among others, must have driven him to find out something which might have also observed sparks of fire given off when he tried to sharpen his weapons of stone or flint. This would have given him some wood to produce fire by friction. Similarly, he would have invented the wheel to make the task of dragging huge weights easier. And these two basic inventions are at the root of most of our new inventions. Man needed medicines to cure his ailments and he found and made miraculous drugs like penicillin and streptomycin. He needed dangerous weapons to fight his enemies and he made atom and hydrogen bombs. It is enough to prove the truth of the maxim: necessity is the mother of invention
