A fly can be eaten by a lizard and later the flies descendants will return the favor.
In which case, the rule of a more pervasive unconsciousness supplanted that of a less pervasive other.
I don't understand exactly your point. A lizard eats a fly. When the lizard dies a lot of flies eat it.
Nature is fair ultimately.
If you are referring to levels of awareness, saying that predation is a lower act than some other, then yes you are right. But a person can use their own values to decide which predations will survive. It is my belief, and my actions reflect this, that natural predation among animals evolves and is justified ultimately.
The predation of artificial laws though serves only as a boundary that has to be watched. Meaning if someone wants to create artificial laws and use force to oblige others to respect them, those laws and their enforcers must be held to a reasonable standard.
'Law enforcement' is not a natural occupation. You have to contort to find an archetypal law enforcer. It is something that did not exist in humanity's past and will not exist in humanity's future. Gangs have always existed though.