Помогите) Есть ли ошибки в написании?) A lot of teenagers join different groups and movements nowadays. Some people say…

Помогите) Есть ли ошибки в написании?) A lot of teenagers join different groups and movements nowadays. Some people say that these groups are created asa way of expression. However, other people say they have created to for them to notice. Others think that it is a protest against the parents. In my opinion, the main reason of joining the group is the ability to show your solidarity with like-minded friends. Different subcultures have their own beliefs, values, fashion and favourite music. For example, hippies of the 1970s wore unusual clothes and had long hair. Furthermore, defending his point of view, the hippies do not resort to violence. By their nature they are peaceful and try to live in harmony with nature.