system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is chemical warfare considered inhumane, and demands international intervention, while other types of weapons that also kill people are allowed?
gpt
Many of the rules surrounding war are based on the principle that killing may be necessary in some circumstances, but suffering should be minimized. Things like torture, chemical weapons, weapons intended to maim but not kill are typically forbidden because they cause excessive suffering.