Human beings have variety of needs, that can’t be satisfied by their individual efforts alone. They need to perform numerous activities to satisfy their wants. Hence organizations are formed to cater to the need of the
society. Individuals join organization and contribute their part for the well- being of the society.
Organizational behaviour is the study of the many factors that have an impact on how individuals and groups respond to and act in organizations and how organizations manage their environments. Although many people assume that understanding human behavior in organizations is intuitive, many commonly held beliefs about behavior in organizations, such as the idea that a “happy worker is a productive worker,” are either entirely false or true only in specific situations. The study of organizational behavior provides a set of tools— concepts and theories—that help people understand, analyze and describe what goes on in organizations and why. How do the characteristics of individuals, groups, work situations and the organization itself affect how members feel about their organization?
The ability to use the tools of organizational behaviour to understand behaviour in organizations is one reason for studying this subject. A second reason is to learn how to apply these concepts, theories and techniques to improve behavior in organizations so that individuals, groups and organizations can achieve their goals. Managers are challenged to find new ways to motivate and coordinate employees to ensure that their goals are aligned with organizational goals.
With regards to Personality, No two individuals are similar.

Every individual has his own characteristic way of behaving, responding to emotions, perceiving things and looking at the world. You might like going out for parties but your friend might prefer staying back at home reading his/her favourite book. It is really not necessary that if you like partying around, your friend will also like the same. Here comes the role of personality.
What an individual sees in his childhood days and most importantly his/her growing days form his personality. How an individual is raised plays an important role in shaping his/her personality.
Personality is nothing but the aggregate conglomeration of memories and incidents in an individual’s entire life span. Environmental factors, family background, financial conditions, genetic factors, situations and circumstances also contribute to an individual’s personality.
In a layman’s language, how we behave in our day to day lives reflects our personality. How an individual behaves depends on his family background, upbringing, social status and so on. An individual with a troubled childhood would not open up easily. He/she would always hesitate to open his heart in front of others. Some kind of fear would always be there within him. An individual who never had any major problems in life would be an extrovert and would never have issues interacting and socializing with others. You really can’t blame an individual for not being an extrovert. It is essential to check his/her background or past life. It is quite possible
that as a child, he was not allowed to go out of his home, play and freak out with friends. These individuals start believing that their home is their only world and they are not safe outside. Such a mindset soon becomes their personality.
Personality is what makes a person a unique person, and it is recognizable soon after birth. A child’s personality has several components: temperament, environment, and character. Temperament is the set of genetically determined traits that determine the child’s approach to the world and how the child learns about the world. There are no genes that specify personality traits, but some genes do control the development of the nervous system, which in turn controls behaviour.
This two in one book offers a highly readable and very concise introduction to organizational behavior and personality development that tells the lay person everything they need to know. It also provides a wealth of insights from the author’s vast experience as a teacher and practitioner in the field. This beautifully written book is destined to become a classic. Please enjoy the read as much I enjoyed bringing it to you.