Personal development has great importance in society because it allows an individual to progress and improve certain aspects of themselves in order to gain a better understanding of himself and adapt better to the world. in which we live. With this, everyone can find and make the necessary changes in order to improve aspects of their life bringing them closer to success and their purpose. The personal development of an individual, through the analysis of the life of Marilyn Monroe, shows its major impact on the advancement of one's life. Born as Norma Jeane Mortenson on June 1, 1926, Marilyn had a difficult upbringing due to the uncertainty of her identity. of her father and mother being mentally and financially unstable to care for and raise her. This led Mortenson to move from family members to friends and foster families, where she was neglected, abused and sexually assaulted. Despite the many traumatic situations she encountered, she found her interest in beauty and theater inspired by one of her worthy tutors. It gave Mortenson purpose and hope in his difficult life. As for personal development, she managed to do so by first working in an aircraft factory while her first husband was serving overseas. She was noticed by one of the officers who encouraged her. becoming a model, which led her to sign with The Blue Book Modeling Agency. Conformity played a huge role in his identity; since to suit their needs, Mortenson dyed her hair blonde and changed her name to the seductive name, "Marilyn Monroe". Her beauty quickly brought her success and attention. After some time, she landed a contract with Twentieth Century Fox, which launched her acting career. His seduction and dramatic abilities caught the public's attention......in the middle of the newspaper......and caused him to commit suicide, refusing to surrender, just as he reached " the top of the world" by exploding the huge gas tank he was on. As for the beauty icon, as she managed to gain national and international fame through her acting and photography and reached the pinnacle of her career, her life began to be gradually emptied by deterioration of his mental and physical health. Soon the starlet's life ends tragically due to drug addiction. To conclude, the character and experiences of Marilyn Monroe show the great effect of personal development in advancing an individual's life, towards the goal or success they have set for themselves. Legacy also shows how one can fall into the spotlight once achieved. This shows that personal development does not stop once you reach the top, your goal or "success" and is always ongoing..