We are all part of one world, one universe. While we are one species, I believe that our species is broken up into many groups, not genetically different, all still Homo Sapiens according to our current science and DNA samplings.
Those groups are delineated by not only the "zero point three percent"'' DNA variance across all Homo Sapiens, but by our geographical location at the moment of our birth, our life span within all geographically locations, our upbringing during those spans of time, education, philosophy, religious influence, physical intrusions upon our bodies, outside influences brought by other groups of Homo Sapiens whose upbringing has put them at odds with us. While current science does not divide our species in to Sub-Species, I am not sure I agree it is correct. There are obviously differences based on our individual physical and mental abilities, some groups have much better developed physical attributes, more overall muscle mass and easier muscle mass development. Other groups have better developed mental capabilities, their members develop higher thinking and calculating skills, they more readily assimilate information they are exposed to and are better problem solvers. Even within those two groups there are more "delineations", splinter groups, on the physical side there are those whose respiratory systems allow them to travel long distances easily, those whose muscle mass allows them to lift and bear great weights, those whose flexibility allows them to contort their bodies in ways most cannot. On the intelligence side, some are able to easily learn almost anything, while some are specific in their learning abilities, math, language, science, music, art and others. While yet others develop uncommon skills, intuitive skills, telepathic skills, other worldly skills.