Altruistic behavior in the natural world
Last time, we considered altruistic behavior in the human world. Since humans are social creatures, even the most egoistic person must work to earn a living, and work means contributing to the benefit of others, thus inevitably leading to altruistic behavior. Furthermore, acts that seek only one's own benefit without altruism are often defined as crimes and subject to social sanctions. So, what about animals and plants other than humans? First, let's look at the relationship between plants and animals. Plants bloom flowers and bear fruit. Insects suck nectar from flowers, and animals eat the fruit. At first glance, it seems that plants are unilaterally used by animals, but when insects suck nectar, pollen attaches to their bodies, and those insects then go to other flowers to pollinate them. When animals eat the fruit, seeds are excreted in their feces, but sprouts grow from those seeds, so the plant, though unable to move, expands its habitat. In other words, even though each...