Nu and imagination is the key to motivating human innovation. However, this necessity has been ambiguous since the existence of "social stratification" and "individual preference". Necessity is classified according to level of social status of human beings belong. This classification has formulated a brilliant founder of humanistic psychology, Abraham Maslow. Maslow classified according to the necessity of caste system named after him, Maslow's hierarchy of needs. In the caste system, supplies inevitably escalate as mankind and its society is progressing. "In our times, human progress, but it seemed to go through massive proportions.
Innovation is responsible for accelerating the unprecedented human technology. Human beings never seem to come up with ideas to make life more convenient and fulfilling. It seems to Maslow's hierarchy of needs, not only limits the economic, social conditions, but has also become tangible in terms of another factor generation. Things are usually considered imaginary over the past few decades, but a necessity to some people in the modern era.
