Survival of the wittiest: How humor and cleverness shaped human evolution

A new theoretical paper suggests that human cognitive and linguistic evolution was driven by early humans’ ability to be clever and humorous, an idea dubbed the “survival of the wittiest.” The analysis argues that the earliest stages of grammar provided a platform for verbal competition and sexual selection, gradually replacing physical violence with verbal agility. The research was published in PNAS Nexus.

For decades, discussions of human evolution have revolved around two dominant ideas. The first is Charles Darwin’s original concept of the survival of the fittest, which is often narrowly interpreted as physical strength or health. The second is the more recent hypothesis of the survival of the friendliest. This newer idea proposes that humans evolved primarily through selection for prosocial behavior and cooperation, which allowed early humans to form alliances and outcompete other groups.

Wayne State University linguist Ljiljana Progovac authored the new paper to offer an alternative viewpoint. Progovac argues that physical fitness and friendliness fail to capture the unique role that language played in human development. Being physically strong or socially cooperative are traits shared with many other animals, including bonobos and other primates. These traits alone do not explain the rapid and unique expansion of human cognition.

According to Progovac, focusing entirely on friendliness misses the competitive nature of human interaction. Evolution involves both cooperation and ruthless competition. To fully understand how our ancestors evolved into modern humans, researchers must account for the biological advantage of eloquence, imagination, and the ability to outwit rivals. This perspective centers on sexual selection, where traits that make an individual attractive to mates are passed down through successive generations.

To build this argument, Progovac analyzed linguistic structures that represent the earliest stages of grammar. Language leaves no physical bones behind, so researchers must rely on a process called reverse engineering. By peeling back the complex layers of modern syntax, linguists can reconstruct the most foundational building blocks of language. These foundational structures are referred to as living fossils.

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In modern languages, these fossils appear as simple two-word combinations consisting of one verb and one noun. Examples in English include words like “killjoy,” “crybaby,” “pickpocket,” and “scatterbrain.” These basic compounds do not rely on complex grammatical rules. They lack the structural layers required to distinguish between subjects and objects or to establish tense.

These simple word pairs are remarkably consistent across entirely different language families. Progovac notes that similar verb-noun compounds exist in languages ranging from Serbian to Berber to Twi. Historically, these basic constructions have been used to create highly vivid, metaphorical nicknames. Often, these nicknames are derogatory or humorous, describing a person based on a prominent action or physical trait.

Progovac proposes that as early humans developed these two-word abilities, a new form of social competition emerged. Individuals who could quickly invent clever, insulting, or amusing names had a distinct social advantage. They could demean rivals and impress potential mates without resorting to physical combat. This quick-wittedness represented an enormous cognitive leap, showing that early language was not just for sharing information but for social maneuvering.

The biological benefits of this verbal agility are still visible in human populations today. In many traditional oral societies across the globe, the most eloquent speakers hold the highest social status. Individuals who can manipulate words effectively gain access to political power and better reproductive success. The ability to charm a mate through humor and metaphorical language proved to be highly adaptive over time.

The paper also reviews experimental evidence from neuroimaging to support this evolutionary timeline. In a prior functional magnetic resonance imaging experiment, researchers tracked brain activity while participants read ancient verb-noun combinations compared to more modern, complex words. The older compounds evoked a more visceral reaction in the brain than modern words.

The experimenters found that processing the older, fossil-like compounds activated the right side of the fusiform gyrus in the brain. This specific brain region is directly involved in face perception and face recognition. Finding that the same brain area handles both face recognition and basic verb-noun processing supports the idea that the earliest grammar was closely tied to naming individuals and attaching linguistic labels to faces.

A related brain imaging experiment looked at how the brain processes simple sentences compared to hierarchical, modern sentences. The simpler sentences resulted in less activity in the Broca’s area and the basal ganglia. The basal ganglia are deep brain structures involved in motor control and learning.

Over the course of human evolution, the connections between the Broca’s area and the basal ganglia became much denser. The gradual mastery of more complex language likely drove the physical evolution of these brain networks. This aligns with genetic changes unique to humans and Neanderthals, including variations in the FOXP2 gene, which is associated with speech and language development.

By replacing physical fighting with verbal dueling, quick-wittedness played a direct role in reducing physical aggression among early humans. Humor and laughter act as natural stress antagonists, lowering cortisol levels in the body. This biological response connects the survival of the wittiest with the concept of human self-domestication. Over time, societies selected for individuals who could use words to defuse tension or assert dominance, leading to a species that prizes cognitive contests over lethal battles.

While this perspective offers a robust framework for understanding language origins, measuring the evolutionary impact of humor and wit relies heavily on reconstructing the past. Researchers must reverse-engineer modern languages and rely on brain imaging proxies, which cannot definitively prove how ancient ancestors behaved in their daily lives. Brain scans of modern humans only provide an approximation of ancient cognitive processes.

Future studies could test this hypothesis by examining how individual variations in cognitive conditions process these fossil grammars. By observing how brains with different neurological setups handle early grammatical structures, scientists can better map the exact neural pathways that allowed language to flourish.

The study, “Survival of the wittiest (not friendliest): The art and science behind human linguistic and cognitive evolution,” was authored by Ljiljana Progovac.