Possible Clues:

• Person who believes in resolving quarrels by peaceful means
• One abhorring violence
• One will seek an end to war, provided one's included in treaty
• Dove
• One better brought up has clenched hand, but he won't use it
• Person who believes in peaceful means, anti-war
• Condition is inserted in treaty for non-belligerent
• A fighting opponent
• Believer in non-violence
• Non-belligerent ensures condition is included in treaty