There is, however, another way to look at purpose in nature. Life can be seen as a planet-scaled game that started four billion years or so ago. A cluster of organic molecules chanced into a pattern of activity in which the molecules, as a group, started producing copies of themselves.
This game of building copies has proved to be self-sustaining. It has continued, changing and developing, in an unbroken flow of activity that still gushes today.
All games have aims built into them. In chess, it is being able to checkmate the other player. In poker, the aim is to win chips, and therefore money, by having the best hand or by convincing other players to fold their hands and concede the pot to you. In Snakes and Ladders, the aim is to be the first to reach the top of the board.
Life’s inherent aim is simply to keep on playing. All that living things do has been shaped by natural selection to pursue this aim. They carry within them an implicit sense of what will increase the likelihood of their survival, their reproduction, and the health of their progeny.