Necessity is the Mother of Invention 

It is only when we need something bad that we put all our energies and resources to find out and invent what we actually need. In the resources to find out and invent what we actually need. In the primitive stone age, man used to live in the jungle. He needed fire to keep himself warm and to protect himself from the wild animals which surrounded him. He, thus, invented fire and some tools to protect himself. When he got tired of wandering, he thought to settle in one place. He came to know that the soil on which he lived could give him enough. He began to cultivate the land and grow corn on it. Similarly to meet the crisis of oil in the world, scientists are busy finding a substitute for it. When the population grew and it became a serious problem, it brought family planning devices. The necessity of recreation developed the invention of the radio, television, and cinema. The difficulties of the journey gave the way to railways, cars, buses and airplanes, and a quick communication network. But these inventions have lured people to earn maximum profits from it. The necessity of selling inventions and earning huge profits has changed the very basic concept of necessity.