Homosexuality exists in hundreds of animals and helps species survive. Why did it come into being? Science offers a surprising explanation
It's a paradox: we live in a time when we can decipher the human genome, capture the echoes of the universe and create artificial intelligence, yet a section of society still manages to take offence at the fact that someone loves someone of the same sex. The argument that "it's not natural" comes up with iron-clad regularity - yet it is nature that wrote this story long before us.
If homosexuality were a mistake of evolution, it would have disappeared long ago. But the opposite is true. It occurs in hundreds of animal species - from penguins to dolphins to lions - and makes clear sense from the point of view of biology and evolutionary psychology. It is not an exception, but part of the natural diversity that helps communities to function, cooperate and survive better.
Nature is not afraid of diversity
Modern science is clear: different sexual orientations are a natural part of life. A study published in the prestigious journal Nature Communications in 2023 provided an extensive analysis of mammalian behavior and found that same-sex sexual behavior (called SSSB) has been observed in more than 260 mammalian species, from male lions to dolphins to bats.
The researchers note that the more social a species is, the more often same-sex interactions occur. In other words, where groups live, where hierarchies, coalitions and friendships form, sexual behaviour outside of reproductive purposes also occurs. It serves a different purpose - to strengthen relationships, reduce tensions and foster trust.
In bonobos (man's closest relatives), intimate contacts between females play a key role in maintaining group peace. When situations escalate, sex literally becomes a tool of diplomacy. In Tasmanian dolphins, on the other hand, males form long-term mates that help each other gain a better position in the group through physical proximity. In nature, it's simply not about "right" or "wrong", but about the functioning of the whole.
Evolution knows what it's doing
Let's think about this from an evolutionary perspective. If homosexuality were a "mistake", natural selection would have eliminated it long ago. But it didn't - and science is beginning to understand why.
Psychologists and biologists now talk about the so-called pro-social hypothesis. According to this hypothesis, genes and behaviours associated with same-sex attraction may have been advantageous for group survival. Indeed, such individuals often show greater empathy, caring tendencies, or the ability to form deeper bonds outside a reproductive context. And these are qualities that increase community cohesion and resilience.
In other words, perhaps it is people who love differently that make human communities stronger and more stable.
Moreover, from a genetic point of view, gene variants associated with homosexuality can increase the fertility of heterosexual relatives - for example, sisters or cousins. Evolution thus preserves diversity not just because it "can", but because it is advantageous.
The biology of humanity
If we look at this without prejudice, we find that homosexuality fits into the story of life with surprising logic. For from the perspective of evolution, it is not just about the spread of genes, but also about maintaining social balance. Homo sapiens survived not because he was the strongest, but because he was able to cooperate, share care and help each other.
And perhaps this is the greatest lesson that nature, through its diversity of orientations, sends us: that true strength lies not in unity but in diversity.
Diversity as the engine of evolution
The differences among us are not a threat, but a source of stability. In nature, the more diverse an ecosystem is, the better it can adapt to change. It is the same with societies. When they are open, inclusive and can appreciate difference, they grow - culturally, morally and humanly.
Homosexuality is therefore not a "problem" that needs to be explained. It is proof that nature is smarter than we think, and that diversity is a basic condition for survival in her world.
Whichever way one looks at it.
Homosexuality was here long before us - and it will be here after us. No ideology, religion or "defenders of traditional values" will erase it because it is not invented. It is as old as life itself.
So maybe we should just stop defending it. And just start seeing it as a natural part of human existence. Because if there's one thing that's been shown time and time again, it's that nature never fails. Only humans do sometimes. ?
