why do 18 years old called the start of adulthood

The age of 18 is often associated with the beginning of adulthood due to several cultural, legal, and societal factors:

1. Legal Recognition: In many countries, turning 18 signifies the attainment of full legal rights and responsibilities as an adult. This includes the right to vote, sign contracts, and take on other legal obligations.

2. Political Participation: At 18, individuals gain the ability to participate in the political process by voting and potentially running for public office in some jurisdictions.

3. Independence: It's a common age for young people to start making more significant decisions for themselves, such as choosing a career path, deciding on higher education, or moving out of their parents' home.

4. Military Service: In some countries, 18 is the age at which individuals can enlist in the military without parental consent.

5. Financial Responsibility: Many legal systems allow individuals to be financially independent from their parents at this age, which might involve paying taxes, managing a bank account, and taking out loans.

6. Criminal Responsibility: At 18, individuals are typically held to the same legal standards as adults in criminal proceedings.

7. Social Perception: Cultural norms and societal expectations often view 18-year-olds as ready to take on more mature roles and responsibilities.

8. Educational Milestone: In many educational systems, 18 marks the end of compulsory education and the beginning of higher education or entry into the workforce.

While 18 is a widely recognized milestone, the transition to adulthood can vary greatly depending on individual circumstances, cultural contexts, and legal systems. Some societies may have different age thresholds or additional rites of passage associated with becoming an adult.