INTRODUCTION y 



small, always has the coefficient, "environment/ 1 and if 

 bad personal antecedents are reinforced by neglect, 

 indecent domestic arrangements, isolation from the dis- 

 turbing and stimulating influences of a vigorous civili- 

 zation, and, above all, if evil example is forced upon the 

 child from his earliest infancy, the product will inevitably 

 be an extraordinary high percentage of pauperism, vice, 

 and crime. Two or three rather important tentative 

 conclusions are: Illegitimacy as such does not invariably 

 entail viciousness or criminality in descendants; crime 

 is correlated with the crossing of vicious blood with a more 

 vigorous outside strain; pauperism is correlated with 

 close inbreeding of a vicious and weakened strain. 



"The Jukes' 1 has long been out of print, to the great 

 regret of all strictly scientific students of sociology and 

 social economy. The publishers render a service to the 

 cause of right thinking and sound teaching in bringing 

 out a new edition. 



FRANKLIN H. GIDDINGS. 



COLUMBIA UNIVERSITY, July 20, 1920. 



