Special attention was paid in it to later childhood and adolescent developments – 'I have always been more attracted to the latency period than the pre-Oedipal phases' – emphasising how the 'increased intellectual, scientific, and philosophical interests of this period represent attempts at mastering the drives'. The problem posed by physiological maturation has been stated forcefully by Anna Freud. "Aggressive impulses are intensified to the point of complete unruliness, hunger becomes voracity... The reaction-formations, which seemed to be firmly established in the structure of the ego, threaten to fall to pieces".