A common belief, which has also been emphasized by certain channeled entities, is that consciousness evolves from one density to another, from 1st Density and up. If this were true, consciousness of the Plant Kingdom, for example, would eventually evolve into becoming an animal (First Density to Second Density), and animals, such as cats and dogs, would eventually evolve into becoming humans (Third Density). Humans would then evolve into the 4th and 5th Densities, and so on, until we become a hive-mind and eventually merge with Source. In other words; it’s a form of hierarchy or a ladder consciousness can climb, which will eventually lead us all to Oneness—a merge with Source.