Psychology is the study of the brain and behavior. Psychologists can help people by understanding how the mind works and assisting those struggling with mental health issues. Happiness is influenced by both internal factors like genetics, personality and thinking patterns, as well as external factors like life circumstances, family, friends and money to some degree. Practicing gratitude and kindness can help make people happier. Unhelpily thinking styles like catastrophizing and mind reading can negatively impact happiness and mental health.