Single celled animals to worms to humans and then beyond is the way of nature; which is to build upon what already exists through constantly modifying things via very small incremental changes. These very small incremental changes add up and cause very major differences in living things as they are finally expressed as fully formed life forms. Look at humans and worms for an example of this. To repeat: On a basic level, humans are very much like worms, but as we move beyond the basic level, we find that the millions of small incremental changes have resulted in a creature that really is very different than worms.
With this basic understanding of nature and life we can then look at closer relatives of humans than worms, and perhaps start formulating some thoughts on the nature of man and existence, and in doing so, perhaps we can throw off the yoke of ignorance that so characterizes our present Dark Age, and the hateful race-deniers.
Here are a few odds and ends, many of which you probably already know, along with a little speculation. Perhaps, connecting up some of these odds and ends will lead to a greater understanding as we cogitate on man, life, God, and destiny.
DNA consists of just 4 nucleotides whose names are usually shortened to the letters A,T,C,G. Shuffle these four chemicals one way and you have a man. Shuffle them another way and you have a worm--so there should be no surprise that humans and worms share some genes.
Human DNA is about 98.4% the same as chimpanzee DNA. This means that all the differences between humans and chimps is contained in only 1.6% of our DNA. To put this another way, chimps are 98.4% the same as humans. Why is this important? Because the race-deniers try to tell us that all humans are virtually the same except for some itsy bitsy minor little genetic things. Even the most evil race-denier should be able to see how that itsy bitsy 1.6% difference between humans and chimps results in a world of difference between the two creatures, and you'd think that in so seeing, they would be able to analogize to differences among different humans as well. Unfortunately, race-deniers have an agenda that requires them to ignore facts, just as their moronic forbears ignored facts and did intellectual headstands to deny that the Sun, and not the Earth, was the center of the solar system.
Gibbons, just to cite one of thousands of similar examples, have a world population of just around 200,000 individuals. These 200,000 individuals are spread into 4 species and 15 subspecies. Man has a population of around 5 billion individuals and we are told by the most zealous race-deniers that not only are all 5 billion humans lumped into one species, but that we are all of one race. Contrary to what the race-deniers want you to believe, the races of man are actually sub-species (because, that's what "race" is), and they would be developing into separate species given proper isolation from one another.
We can say, for our purposes, that evolution is a slow change to a higher state. A higher state for humans, must mean some level of higher consciousness (meant here to mean all things of the mind). This is so, because the thing that really distinguishes humans from other living things on Earth, is our physical brain and the mind that is one of its products. The way one would consciously go about evoloving a creature would be by selecting members of a larger population--the masses--with particular traits that one wants to encourage and to allow those with these traits to breed pure. This is accomplished by a separation from the masses which, by definition, have to be average in intellect and other characteristics, otherwise they wouldn't be the masses. The way one would consciously go about devolving a creature would be by folding those with different traits back into the masses. Species evolve by being different and separate. They devolve by being the same and not separate.