He described himself as being "the binman of the Reich" Gerwrath very well illustrated the total departure between the values to which he had been raised as a child and those which he had adopted and become so totally devoted to, Heydrich was totally aware of nature of his directives but like so many, he had divorced himself from the basic humanity involved. he said that " we should have sympathy only for our German people and not for the Jews". For him, the aims and outcomes justified the means and like Himmler, he recognised the need for secrecy and that the German people did not need to know the nature of their " Final Solution". Kershaw pointed to the "protogenocidal aspect of Hitler's being an example of which was his saying " And when we have won, who will question the means". Gerwarth points to early May 1942 as being the approximate time period when genocide was officially adopted as being a ( secret) State Policy, they had largely gone down this pathway already as a means of achieving other ends and solving what were regarded as "local problems" which had to a great extent been the result of the racial policies of the Nazi State. Wansee was a means of exerting control over the Final Solution, the nature of this solution was officially defined and actioned by Hitler, Himmler, Heydrich and later senior Ez.Gruppen leaders. (A series of meetings, not all attended by Hitler) but it would appear genocide by nature of the camp system stemmed from these meetings. Those who would deny the Holocaust and insist that " there must be a written order and that without such an order no one can implicate Hitler" take no account of the need to know nature, Hitler's having learned from T4 that others existed to take his order and that if it was ever written this was now destroyed and that it not being in existence does not follow that it was never given. (eg Irving's "$1,000 " reward", this crew ( Mattogno) has simply now moved on to deny the killings of the Einsatzgruppen and the records generated by Heydrich's office. Historical dishonesty of the worst kind). Also see Peter Longerich's "The Unwritten Order".