أغرب عادات وتقاليد الشعوب عبر التاريخ - محمد صلاح الدين

The book Salah is reading revolves around the idea of people having different behavioral profiles, as not everyone can be dealt with in the same way, and also how people see themselves in relation to their environment. Erikson divides behavioral patterns in the book into one of these colors: red, yellow, green, and blue.