Humans are really the only animal that lies overtly. Other animals deceive via misdirection, but in a world of scarce resources, and where everyone has to play by that game, it's a fair bit easier to justify.
Humanity has so much dominion over its environment at this point that there really is no need for resource competition, from a survival perspective. But good luck getting people to all agree to share collectively. And unless everyone does it, no one will do it.
> Humans are really the only animal that lies overtly.
Cite required.
I've seen dogs "lie" to me by hiding the snacks they stole. That alone disproves your claim.
I've also seen video of two monkeys hide their mating behavior when the alpha male walks by: their illicit "love" required lying to the only male "allowed" to mate.
Humanity has so much dominion over its environment at this point that there really is no need for resource competition, from a survival perspective. But good luck getting people to all agree to share collectively. And unless everyone does it, no one will do it.