Identity encompasses one's memories, experiences, relationships, and values that create a sense of self over time. Identity is constructed through social interactions and develops across different domains like family, gender, ethnicity, and religion at various stages of life. Erik Erikson proposed that people experience crises during life stages that influence identity development. James Marcia identified four identity statuses - identity achievement, moratorium, foreclosure, and diffusion - based on whether an individual has experienced a crisis and made commitments in important identity domains. Studying identity statuses can provide insight into how individuals develop their sense of self, including their religious or ethnic identity.