Human life span contributes the knowledge humans acquire, matured, and become accustomed from initial stages to adulthood to mature stages of life. In these human lifespan development studies the main areas of emphasis comprise of physical, intellectual, societal, intelligent, conceptual, persona, and emotive growth. Some respectable theories of development consist of psychoanalytical theory, learning theory, and cognitive theory. Human nature and behaviour could be explained through these theories. Introduction: The theories of psychoanalysis were known as the extremely influential force during the twentieth century. Then come the behavioural child development theories, which consist of the observable and quantifiable behaviours to become more scientifically disciplined.