Identical twin cousins, early 50s. J has 11 O levels, 3 A levels, a first class BSc, a Phd, a long, successful career, a beautiful secure home, long marriage, and two happy, successful adult children, (one academic, one not so, but doing great in their own sphere). travel, sports, holidays, good company, kind, reliable, healthy, drinks a bit, not overweight. K has no qualifications, a long criminal record, violent, 4 prison sentences (that I know of) , homeless, has been a rough sleeper several times, for months at a time, several broken relationships, lost touch with children taken into care, has done occasional casual manual labour, but never kept a job, dying of lung cancer. identical, identical lives, identical social and academic achievement until K started smoking marijuana when we were young teens, 35 years ago, and J refused. a very stark example, it is rarely so clear cut, but I see so many young people set of down Ks path, frequently with parents don't think its a big deal if their child does "because everybody does" and they maybe do too. Why aren't we taking this more seriously in society?