Intense competition without duel structure does not drive weapon evolution.

Evidence

Cicada-killer wasps experience intense male competition for localized resources (buried females), but they lack elaborate weapons. … Both cicada-killer wasps and horseshoe crabs face intense competition for females who are localized and defensible, the first two conditions for an arms race. But fights unfold as scrambles rather than duels. They lack the condition of Lanchester’s linear law, and large weapons are not cost-effective. — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 242

Categorization

• XREF: connects to: State arms races mirror single male-male animal contests, not evolutionary turnover; Weapon evolution needs both competition and economically defensible resources — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 191; Big weapons only pay off when fights are one-on-one duels — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 238 (+5 more)

Related

• State arms races mirror single male-male animal contests, not evolutionary turnover (similarity 0.92)
• One-on-one duels favor weapon evolution while chaotic scrambles do not. (similarity 0.89)
• Specific conditions are required before weapons escalate into an arms race (similarity 0.89)
• Dueling plus competition and defensibility is the general rule for extreme weapons (similarity 0.88)
• Three conditions must align to trigger an animal weapons arms race. (similarity 0.88)
• Weapon evolution needs both competition and economically defensible resources (similarity 0.88)
• Animal and human fights both hinge on whether duels or gang-ups occur (similarity 0.87)
• Big weapons only pay off when fights are one-on-one duels (similarity 0.86)
• Specific ecological circumstances must align before weapon arms races begin (similarity 0.86)
• Concentrating simultaneous fire disfavors large weapons while duels favor them (similarity 0.86)
• Weapons evolve only when reproductive benefits exceed costs (similarity 0.86)
• Competition for reproduction drives evolution of nature’s biggest weapons (similarity 0.85)
• Tunnel dwellers fight successive duels and evolve weapons; open-ground species scramble without them. (similarity 0.85)
• Fortification-artillery escalation mirrors predator-prey arms races, not rival contests (similarity 0.85)
• Losing the ecological context of competition can make extreme weapons vanish. (similarity 0.84)

Broader Connections

• Dueling plus competition and defensibility is the general rule for extreme weapons #corroborates (0.85) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 266
• Symmetrical one-on-one fights are a neglected prerequisite for weapon arms races #corroborates (0.80) — Emlen, Douglas J, Animal Weapons_ The Evolution of Battle, 226
• Burrow-guarding constrains fights to duels and drives weapon evolution #exemplifies (0.70)