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 as "a complete blueprint for winning the war against Mau Mau using socioeconomic and civic reform." What developed, however, has been described as a British gulag. The Pipeline operated a white-grey-black classification system: 'whites' were cooperative detainees, and were repatriated back to the reserves; 'greys' had been oathed but were reasonably compliant, and were moved down the Pipeline to works camps in their local districts before release; and 'blacks' were the so-called 'hard core' of Mau Mau. These were moved up the Pipeline to special detention camps. Thus a detainee's position in Pipeline was a straightforward reflection of how cooperative