Defining evil is complicated by its multiple, often ambiguous, common usages: evil is used to describe the whole range of suffering, including that caused by nature, and it is also used to describe the full range of human immorality from the "evil of genocide to the evil of malicious gossip". It is sometimes thought of as the generic opposite of good. Marcus Singer asserts that these common connotations must be set aside as overgeneralized ideas that don't sufficiently describe the nature of evil.