[pschw]

There's a massive scholarly debate about when exactly the Final Solution took shape, with one school of thought being that it wasn't until after the invasion of the USSR that extermination became the goal. Christopher Browning's _The Origins of the Final Solution_ [0] provides a good overview of this position.

[0] https://www.nebraskapress.unl.edu/bison-books/9780803259799/

[hef19898]

The Wannsee conference would be my choice for the date the final solution (gas chambers and exterminatiom camps and sich, the holocaust of bullets started right away) became official policy. Obviouspy all the back room decision have already been met by then, the Wannsee Conference being more of a working level implementation meeting.