Final answer:
The statement that important cognitive and social 'crises' occur across the entire lifespan is true, aligning with developmental theories like those of Erikson that propose various challenges and tasks across different life stages.
Step-by-step explanation:
The question addresses the topic of psychosocial development and concerns the statement that important cognitive and social "crises" occur across the entire lifespan, which is true. Developmental theories, particularly those proposed by Erik Erikson, suggest that individuals experience different challenges and developmental tasks at various stages of life—from infancy through late adulthood. These stages encompass both cognitive milestones, like those related to intellectual development, and psychosocial crises—such as the transition from adolescence to adulthood and dealing with integrity versus despair in old age. Throughout a person's life course, they undergo socialization to new roles at different age-related transition points, which can be significant moments for cognitive and social evolution. Social supports and active engagement in life are suggested to promote healthy aging and psychological well-being during these transitions. The life course concept highlights that these stages are somewhat predictable but can be influenced by cultural norms and individual experiences. Indeed, these life 'crises' or transition points are present and crucial throughout the lifetime.