When a challenge to status occurs — someone disrespects you, questions your authority, competes directly — testosterone levels rise. This is the "challenge hypothesis": testosterone doesn't cause aggression generically; it maintains status through whatever behavioral display is locally understood as status maintenance.
In a male baboon troop, testosterone rising after a challenge prompts aggression — slashing an opponent or giving a threat stare that says "you have no idea who you're messing with." In a negotiation, it prompts aggressive bidding or ultimatums. In a corporation, it might prompt status-signaling dress, controlling the room's attention, or strategic displays of wealth.
The key insight: testosterone doesn't create new social patterns. It exaggerates existing ones. In a monkey troop, a mid-ranking male given testosterone became aggressive not to the high-rankers (who would destroy him) but to the low-rankers below him. Testosterone amplified his bullying of those weaker.1
What counts as "maintaining status" is entirely context-dependent. You don't always fight your way to the top or punch your way to keep it. Status display takes the form locally valued as impressive.
In cultures valuing military prowess, status displays are martial — weapons, scars, combat tales. In academic cultures, status displays are intellectual — publications, citations, controlling the narrative in seminars. In corporate environments, status displays are commercial — office size, car quality, control over resources.
The mechanism is identical: testosterone rises in response to a status threat; this primes behavioral escalation in whatever domain is locally understood as high-status. The person's brain computes: "What behavior counts as impressive here?" and amplifies that behavior.2
This explains why "manly" behavior varies so radically across cultures. In some societies, dominance is demonstrated through physical aggression. In others, through generosity (giving away wealth). In others, through intellectual display. The hormone is the same; the performance is culturally scripted.
Status displays are often costly — they waste resources on impressiveness. A male bird's elaborate plumage uses energy and makes him visible to predators. Peacock tails are enormous handicaps evolutionarily, yet females prefer them. Why? Because a male who can afford such wasteful display is signaling "I'm so fit, I can waste energy on looking good and still survive."
Humans do the same thing through display goods and performances: luxury cars, expensive clothing, conspicuous leisure time, intellectual showing-off. These are costly signals of status — you're saying "I can afford to waste resources on impressiveness."
In tribes with less economic stratification, status signals are different: leadership, generosity in redistribution, mastery of ritual knowledge. But the principle is identical: costly signaling of capabilities that make someone worth deferring to.
Hierarchies are never actually about the surface display. A corporation's hierarchy isn't about whose office is fanciest; it's about who controls resources and decisions. But the fancy office signals that control, making the hierarchy visible and acknowledging-able to everyone.
Behavioral-mechanics describes status displays as learned performances — culturally-scripted behaviors that vary radically across contexts. What "counts as impressive" is locally determined: martial prowess in one culture, generosity in another, intellectual display in a third.
Psychology provides the neurobiological mechanism: testosterone doesn't create dominance-seeking behavior. It amplifies whatever behavioral patterns are locally understood as status maintenance. The challenge hypothesis shows testosterone rising in response to status threat — then the brain asks "what counts as impressive here?" and amplifies that behavior.
A testosterone surge in a monkey troop amplifies aggression toward lower-ranking animals (bullying), not toward higher-ranking ones. A testosterone surge in an academic seminar amplifies intellectual assertiveness and argument-control. A testosterone surge in a tribal culture might amplify generosity (if generosity is what signals status). Same hormone, radically different behavior.
Where behavioral-mechanics explains what gets performed (culturally-determined status displays), psychology explains the neurobiological mechanism that enables the performance to escalate (testosterone amplification of context-appropriate behavior). Neither domain alone explains why the same hormone produces such different outcomes — that requires understanding both the culturally-determined context and the hormone's role as an amplifier of that context's values.
The tension reveals: you cannot change status behavior by changing hormone levels. A man on testosterone will still follow the local rules about what "counts as impressive" — the hormone just turns up the volume. To actually change dominance performances, you have to change the context that defines which behaviors are locally valued. Testosterone is neurobiological noise applied to a culturally-determined signal.
The Sharpest Implication
Status behaviors are performed, not inevitable. What counts as impressive is culturally determined. You don't naturally know how to "win" at status — you learn it by observing what your culture rewards. Once you understand what counts as impressive locally, testosterone amplifies your performance of it.