At what age range does adulthood generally begin?

Adulthood is typically recognized to begin around the age of 18, which aligns with many legal definitions of adulthood, such as voting, drinking alcohol, and entering into contracts. This age marks a significant transition in psychological and social development, where individuals start to assume greater responsibilities and privileges associated with adult life. While the concept of adulthood can vary culturally and may extend into the early 20s, the age range of 18 to 21 is commonly accepted in various contexts, including educational and legal frameworks. Recognizing this critical period helps in understanding the developmental milestones and challenges faced by individuals as they transition from adolescence into adulthood.