The major underlying principles here relate to chromosomes and Jungian theory. Some of the ideas behind this song are based on the teachings of Drunvalo Melchizadek. Here's a snip of an interview with him (Leading Edge, 12/95):
"There are three totally different kinds of humans on the Earth, meaning that they perceive the One reality in three different ways, interpreted differently. The first kind of human has a chromosome composition of 42+2. They comprise a unity consciousness that does not see anything outside themselves as being separate from themselves. To them, there is only one energy - one life, one beingness that moves everywhere. Anything happening anywhere is within them, as well. They are like cells in the body. They are all connected to a single consciousness that moves through all of them. These are the aboriginals in Australia. There might be a few African tribes left like this. Then, there is our level, comprising 44+2 chromosomes. We are a disharmonic level of consciousness that is used as a steppingstone from the 42+2 level to the next level, 46+2...These two additional chromosomes change everything."
According to Melchezedek, our planet is covered with geometrically constructed 'morpho genetic grids'. These grids extend from about 60 feet under the Earth's surface to about 60 miles above the Earth, arranged in geometric patterns (see 'Sacred Geometry'). Each species has its own grid, which supports life, and connects the consciousness of its particular species. Before any species can come into existence or make an evolutionary step, a new grid must be completed. When a species becomes extinct, that particular species' grid dissolves.
A new grid was completed in 1989 - the 'christ-consciousness' grid. This grid will allow humans to evolve into our next version. We'll develop two additional chromosomes (which are really 'geometrical images' designed to resonate with our specific grid) for a total or 46 + 2.
The main change will be a shift to the "unity consciousness". Every cell in your body has its own consciousness and memory. You, the higher being that occupies your body, make the millions of different consciousnesses in your body work together as one being. How does this relate to this grid? Think of yourself as a cell and the grid as the higher being. We will still have individual consciousness, but will be united in the form of a higher being in order to work as one entity."