May 14, 2017 People continue to mature and grow as individuals throughout our lifetimes (at least ideally). So the 45 year old you would probably not only be better equipped to make decisions than the 25 year old version, but also in all likelihood be a very different person, both literally (in the replacing of your body’s physical makeup in that gap) and mentally. Nevertheless, the 45 year old version of you and the much less mature and less accomplished 25 year old version are, in most societies, living under the exact same set of rules and restrictions. So why is some arbitrary number like 18 or 21 considered the cutoff point when society says everyone should be operating on a level playing field, legally speaking? Want the text version?: http://www.todayifoundout.com/index.php/2016/08/age-become-adult/