sentences:  According to Christopher Browning, writing in 2004, most historians maintain that there was no order before the invasion to kill all the Soviet Jews.Longerich wrote in 2010 that the gradual increase in brutality and numbers killed between July and September 1941 suggests there was "no particular order"; instead it was a question of "a process of increasingly radical interpretations of orders".According to Dan Stone, the murder of Jews in Romania was "essentially an independent undertaking".