Aggression, or the so-called evil

Konrad Lorenz is an outstanding zoopsychologist, Nobel laureate in physiology and medicine.
“Aggression, or the so -called evil” is one of his most famous works, in which he considers aggression on the example of a variety of biological species - aquarine fish, rats , geese, wolves and, finally, people come to a paradoxical conclusion: deep personal attachment occurs only in those communities where a high level of aggression is observed. Where there is no aggression - there is no strong friendship and true love. So can aggression be considered evil, and the suppression of aggression is good? And can humanity develop in case of complete abandonment of aggression in relation to its own?