The question of whether humans are naturally monogamous has divided scientists, philosophers, and couples therapists for decades. While society tells us that lifelong fidelity is the ideal, our genes whisper something entirely different to us. Artwork Images, a space for queer art and visibility, is also dedicated to such uncomfortable truths — ones that were taboo for a long time. In this article, we want to honestly confront the tension between our evolutionary heritage and the social constructs that shape our love lives.
Evolutionary biological fundamentals: What nature has given us
To understand why fidelity is so difficult for many people, we must first look to the past — not the history of civilization, but the history of evolution. Millions of years have shaped our biological systems, long before there were wedding ceremonies or marriage contracts.
Always ready. Male mating readiness from an evolutionary perspective
From an evolutionary biology perspective, men’s constant mating readiness is no coincidence or moral failing — it is a survival strategy. While women are biologically limited to a few fertile days per month, men can, in theory, be reproductively active at any time. Always ready! This asymmetry has deep roots in our evolutionary history.
The reason lies in the different biological investment in offspring. A woman invests nine months of pregnancy and years of breastfeeding in a child. A man can invest genetically in seconds. From this mathematical reality emerges a fundamental evolutionary strategy: men gain reproductively by mating with as many partners as possible. The more potential mothers for their genes, the higher the chance that their genetic information will be passed on.
This is not evil or immoral — it is simply biology. Nature has no morality; it only has strategies that work or do not work. And the strategy of high male mating readiness has proven itself over millions of years.
Reproductive strategies in nature
If we look at the animal kingdom, we see these strategies everywhere. In many primate species, our closest relatives, males are not monogamous. Gorillas live in harem structures, chimpanzees practice promiscuity, and even bonobos, often portrayed as especially peaceful, are not limited to monogamous pairs when it comes to sexual activity.
Only about 3-5% of all mammal species practice monogamy. And even in these species, social monogamy is often not the same as genetic monogamy — DNA tests frequently show that offspring come from multiple fathers, even though the parents live together socially as a pair.
The point is: monogamy is the exception in nature, not the rule. And when it does occur, it is often a strategy to secure resources or prevent infanticide — not a matter of romantic love.
Monogamy as a social construct: A historical perspective
If monogamy is not our biological default setting, how did it become the dominant norm in Western societies? The answer lies in history — and it is less romantic than we like to believe.
The economic invention of monogamy
The monogamy we know is closely tied to the rise of private property and class societies. When people began to own land and accumulate wealth, a new problem arose: how do you ensure that your own son, and not another man’s, inherits the estate?
The answer was controlling female sexuality through monogamy. By restricting women to one man, one could be reasonably certain who the biological father was. This was not invented out of love, but out of economic necessity. Monogamy was a provision tool — a way to secure property and power across generations.
This also explains why monogamy was historically enforced much more strictly for women than for men. Men were allowed concubines, mistresses, or enslaved women, while women who were unfaithful were often punished with death. The double standard was not accidental — it was structurally necessary for the system.
Cultural norms vs. biological reality
Over time, this economic necessity was transformed into cultural and religious ideals. The church preached the sanctity of marriage. Poets wrote love poems about eternal fidelity. Social norms became so strong that people began to believe monogamy was not only socially right, but natural as well.
But biology has not changed. Our genes are still the same as they were 10,000 years ago, when these systems were invented. We have only learned to suppress our natural impulses — or at least, to try.
The natural drive and its attempts to break through
This is where the central tension of our modern lives emerges: we are biological beings with evolutionary imperatives living in social systems that deny or suppress those imperatives.
Psychological conflicts between norm and instinct
The result is a constant inner conflict. A man in a monogamous relationship may fall in love with or feel sexual attraction toward other women or even men — not because he is a bad person, but because his brain and body are programmed for exactly that. This attraction cannot be controlled rationally; it is automatic.
At the same time, this man may have genuine love for his partner, commitments that matter to him, and a self-image as a faithful person. These two systems — the evolutionary reward system and cultural values — can be in direct conflict.
Psychologists call this cognitive dissonance. We know that we could or might be unfaithful, but we also want to be faithful. We judge others for infidelity while struggling ourselves with temptation. We watch pornography or flirt in secret while telling our partners that we are completely satisfied.
Scientific findings on fidelity
Research confirms these inner struggles. Studies show that about 20-25% of men and 10-15% of women are unfaithful in their relationships. But even more interesting are the data on temptation: When people are asked whether they have ever had sexual or romantic feelings for someone other than their partner, about 70-80% answer yes.
That does not mean most people are unfaithful — but it does mean that most people struggle with temptation. The drive is there, even if the action does not follow.
Neuroscientific research also shows that the brain regions responsible for sexual attraction cannot simply be switched off just because someone is married. The same dopaminergic systems that draw us toward new partners remain active.
The tension: social expectation vs. biology
So why do people live monogamously at all if it is so biologically difficult? The answer is complex and shows the power of culture and reason.
Why people still live monogamously
First, there are real benefits to monogamy that go beyond the biological level. A stable partnership offers emotional security, mutual support, and the chance to develop deep bonds that go beyond mere sexual attraction. Love is not just biology — it is also psychology, habit, and conscious decision.
Second, humans have the ability to control their impulses. We are not just animals that follow our drives. We have reason and willpower. We can choose to be faithful, even when it is difficult.
Third, there are social consequences. Infidelity can destroy relationships, tear families apart, and bring social stigma. These consequences are real and act as a deterrent.
Costs and benefits of fidelity
But there are also costs. Suppressing natural impulses can lead to frustration, resentment, and sometimes mental health problems. Some people develop depression or anxiety disorders when they suppress their sexuality too strongly. Others become bitter about the compromises they have made.
And then there is hypocrisy. Many people are monogamous while secretly consuming pornography, having emotional affairs, or falling in love with other people. They live a lie to satisfy the social norm.
Modern perspectives on relationships
Fortunately, this is beginning to change. More people are exploring alternative relationship models such as open relationships, polyamory, or conscious non-monogamy. These models try to reconcile biological reality with emotional needs — by admitting that people can be attracted to multiple people while still maintaining deep bonds.
This is not right for everyone, and it does not work automatically. But it shows that it is possible to deal more honestly with our nature instead of pretending it is not there.
Reconciling nature and culture
The truth is uncomfortable: we are biological beings with evolutionary imperatives living in social systems that deny those imperatives. Monogamy is not natural — but that does not make it wrong. Culture and reason are also part of our nature.
The key is to deal honestly with this tension. We should stop pretending that monogamy is simple or natural. We should not judge people who struggle with temptation, but rather understand that they are struggling with something deeply rooted in our biology.
At the same time, we should not underestimate the power of love, attachment, and conscious decision. Yes, we are animals with drives. But we are also thinking, feeling beings who have the ability to reflect on our impulses and choose how we want to live.
The answer is not to deny our nature or to submit to it completely. It lies in recognizing both sides and dealing honestly with the tension between them.
