Mau Mau Uprising given rise to three native Kenyan political blocks: "conservative", "moderate nationalist" and "militant nationalist". It has also been argued that Mau Mau was not explicitly national, either intellectually or operationally. Bruce Berman argues that, "While Mau Mau was clearly not a tribal atavism seeking a return to the past, the answer to the question of 'was it nationalism?' must be yes and no." As the Mau Mau rebellion wore on, the violence forced the spectrum of opinion within the Kikuyu, Embu and Meru to polarise and harden into the two distinct camps of loyalist and Mau Mau. This neat division
Mau Mau Uprising view was that Mau Mau as a savage, violent, and depraved tribal cult, an expression of unrestrained emotion rather than reason. Mau Mau was "perverted tribalism" that sought to take the Kikuyu people back to "the bad old days" before British rule. The official British explanation of the revolt did not include the insights of agrarian and agricultural experts, of economists and historians, or even of Europeans who had spent a long period living amongst the Kikuyu such as Louis Leakey. Not for the first time, the British instead relied on the purported insights of the ethnopsychiatrist; with Mau Mau,