Deterrence amplifies the evolutionary payoff of extreme weapon size.

Evidence

Deterrence, in turn, feeds back on the arms race, driving weapon evolution forward at a faster and faster rate. The moment weapons start functioning as cues of fighting strength, a whole new incentive for extreme size arises. Now, males with the biggest weapons win for two reasons: because they defeat rivals in battle, and because their weapons are big enough to end most confrontations without a fight. Fight costs saved by deterrence compound already-impressive rewards for males with the largest weapons. — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 387

Categorization

• XREF: connects to: Concentrating simultaneous fire disfavors large weapons while duels favor them; Extreme skew in mating success drives arms-race escalation in weaponry; Weapon costliness keeps signals honest by excluding weaker males (+23 more)

Related

• Weapons primarily deter rivals rather than inflict harm in actual fights (similarity 0.91)
• Weapon evolution and deterrence form a self-accelerating spiral. (similarity 0.90)
• Weapons work primarily as deterrents that prevent fights rather than win them (similarity 0.90)
• Reproductive success, not survival, drives the largest animal weapons (similarity 0.90)
• Dueling plus competition and defensibility is the general rule for extreme weapons (similarity 0.90)
• Weapon growth widens the gap between the best- and worst-armed males. (similarity 0.90)
• When balancing selection fails, bigger weapons win every round and escalate the race. (similarity 0.89)
• Sexual selection drives weapons to extremes because payoffs for winners are enormous. (similarity 0.88)
• Weapon costliness keeps signals honest by excluding weaker males (similarity 0.88)
• Weapon size in animal species is under stabilizing selection, not open-ended directional selection (similarity 0.88)
• Each weapon-size increase resets the competitive baseline, ratcheting populations upward (similarity 0.88)
• Sexual selection can be far stronger than natural selection and drives weapon extremes (similarity 0.88)
• Weapon escalation ends when costs outweigh benefits and cheaters invade (similarity 0.88)
• Weapons evolved as signals so males could predict fight outcomes before risking battle (similarity 0.88)
• Bigger weapons usually fail because their costs outweigh their benefits (similarity 0.87)

Broader Connections

• Weapon evolution and deterrence form a self-accelerating spiral. #expands (0.85) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 390
• Weapon size in animal species is under stabilizing selection, not open-ended directional selection #contradicts (0.75) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 850
• Natural selection usually favors modest weapon size because cost offsets benefit #contradicts (0.70) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 21
• Balancing selection normally curbs weapon size until some lineages escape into runaway arms races #expands (0.60) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 22
• Costly advanced weapons deter rivals just like large animal weapons #corroborates (0.55) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 592
• Animal weapons evolved to extremes far beyond practical size #expands (0.50) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 2
• Competition for reproduction drives evolution of nature’s biggest weapons #complicates (0.45) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 136