212 THE ANATOMY OF SCIENCE 



ago I suggested an experiment to test the in- 

 heritance of acquired fear, using incubator 

 chickens to avoid any possibility of instruction, 

 and asked one of our leading geneticists what he 

 would say if a positive result were obtained. He 

 replied, "I would say that the experiments had 

 been badly performed." I then asked him what 

 he would say if he had himself performed the 

 experiment. He answered, "I would not believe 

 my own eyes." 



Let us now turn our attention to another phe- 

 nomenon which I have chosen, not merely be- 

 cause it is curious, but because its discovery is 

 one of those crucial observations which has the 

 power to change our whole attitude toward 

 nature. Various authors have mentioned the 

 numerous cases of apparent imitation of one 

 species by another, but there is one case which 

 is far more significant than all of the others 

 that have been observed. If I should ask you 

 what animal it is that has learned self-sacrifice 

 and loyalty, that has developed a great indus- 

 trial system with special laboring and military 

 classes, that has built great structures fifty or 

 a hundred times his ot\ti height, that has domes- 

 ticated animals, and created an agriculture, 

 with species of plants not to be found in the 



