 Other Israeli historians, such as Morris, reject the idea that "transfer" thinking led to a political expulsion policy as such, but they explain that the idea of transfer was endorsed in practice by mainstream Zionist leaders, particularly David Ben-Gurion.Critics of the "transfer principle" theory cite addresses by the Zionist leadership that publicly preached co-existence with the Arabs, but in private put forward their own plans, or gave support to plans involving the transfer of Arabs from Palestine.The idea that "transfer ideology" contributed to the exodus was first brought up by several Palestinian authors, and supported by Erskine Childers in his 1971 article, "The wordless wish".