Changes

Recruits are typically chosen from the best warriors among humanity. Naturally, this makes [[Death World|Death]] and [[Feral World]]s prized recruitment grounds, as such harsh and primal conditions produce the best warriors. However, [[hive world]]s are considered the ideal source of potential recruits; while the populace of the lower levels are often composed of some of the most murderous scum in the human [[Imperium]], more importantly, the higher the population of a world, the higher the chance to find truly impressive individuals. Whole gangs of hive scum are sometimes hunted down and captured for recruitment, although chapters typically prefer volunteers. Among the most valued traits in a recruit are aggression and psychotic-level killer instinct. More rarely, certain [[civilized world]]s are also recruited from.{{Fn|4}}

Recruits must be fairly young, because implants often do not become fully functional if the recipient has reached a certain level of physical maturity. They must be male because the geneseed zygotes are keyed to male hormones and genetic structure. Only a small percentage of people are compatible with the implants and hypno-suggestion necessary to turn them into Marines. Before the process of implantation begins the potential recruit receives tissue compatibility tests and psychological screening. If the testing proves successful the recruit becomes an [[aspirant]]. After the organ implantation process begins he becomes a [[neophyte]]. When the final implant is in place and the requisite training and hypnotherapy complete, he becomes a full [[brother]].{{Fn|1}}{{Fn|2a}}{{Fn|3}}