The use of force to settle conflicts is much debated in theory and in practice (see moral philosophy, ethics).When a conflict is viewed as being between parties having the same standing, observers often recommend the use of negotiation or other "conflict resolution" techniques. When a conflict is viewed as being between a law-breaker and a law-enforcer, observers tend to side with the enforcer (but with important exceptions). Analysis of conflicts, and of when and where it is legitimate for an involved (or intervening) party to use force to settle it, quickly becomes complicated.