Positive feedback always involves the danger of an ` avalanche ' effect ... One particular kind of positive feedback occurs when individuals OF THE SAME SPECIES enter into competition among themselves ... For many animal species , environmental factors keep ... intraspecies selection from ( leading to ) disaster ... But there is no force which exercises this type of healthy regulatory effect on humanity 's cultural development ; unfortunately for itself , humanity has learned to overcome all those environmental forces which are external to itself '' p44 .
p43 Positive feedback always involves the danger of an ` avalanche ' effect ... One particular kind of positive feedback occurs when individuals of the same species enter into competition among themselves ... For many animal species , environmental factors keep ... intraspecies selection from ( leading to ) disaster ... But there is no force which exercises this type of healthy regulatory effect on humanity 's cultural development ; unfortunately for itself , humanity has learned to overcome all those environmental forces which are external to itself '' .