Crimes against humanity involve an attack against any civilian population, committed either widespread or systematic, with knowledge of the context of the attack and an intention to further said attack. The concept of attack is broad and includes, murder, extermination, rape, enforced disappearance, torture and other criminal conduct. The attack may be perpetrated against any civilian population, regardless of its particular characteristics, unlike genocide where the underlying criminal acts must be directed against four identifiable groups. The prosecutor need only prove either that the underlying offences were mass or committed over a large part of a population (widespread), or that they were committed as part of a systematic plan. Finally, just like any other criminal offence, it must be proven that the perpetrators knew of the overall context (widespread or systematic) and intended to partake therein.