Whiteness and race are invented concepts postulated by guilty rich people who needed to justify their sociopathy in the early 20th century by social Darwinism. The 'white' race is a modern invention as Europeans had been fucking murdering each other since the dawn of time. Conveniently, all of the people deemed non-white by Social Darwinism and Racial Science of the 20th century were immigrant groups that were being worked to death by the rich in their factories. Irish, Italians and Slavs are notably the people not considered 'white'. Eugenics was an incredibly popular science in America in the 1930s until Hitler.
'Blackness' is uniquely American and defined by African Americans unable to trace their ancestry. It is a foreign concept outside of the United States.
Race is a cultural concept far more than a genetic or phenotypic one. As evidenced by many pictures in this thread, children from mixed families can come out as looking like one race or the other, and it might even be impossible to tell that they are mixed. Race is a cultural phenotype; a grouping of specific cultural characteristics and identifiers that put us into specific groupings. Appearance, dress, language and speaking are part of this cultural phenotype.
This gets more complicated when powers that be want to divide people into races in order to control them and foster hatred of the lower classes. Generally, this has been used as a tool to get races to kill each other in order to stop racial unity and looking to the powers that be as their true oppressors. So race is an incredibly complicated component that has been manipulated by ill-intentioned people throughout history, making defining it an ultimately fruitless task as people tend to have an ulterior motive when doing so.
For all intents and purposes, stripping it of its (HIGHLY) charged nature, race is: A cultural phenotypic indicator based on behavior, appearance, food, political values, speech in which they can be categorized as belonging to a certain region, class, nationality, city or community. Genetics plays a role, but in general, nurture and environment are going to shape the way genetics come out.
We do have inborn behaviors and do share behaviors with our parents, but to the extent to those which are racial are entirely subjective, not objective. Race is not objective and actually does not exist in any meaningful sense besides the one we attribute to it.
1) Wolves and Dogs are the same species. Dog breeds, much like races, do not actually exist. They are entirely a subjective classification. Genetic dog tests are nearly identical to 23andMe tests. They compile a bunch of genetic data from a region (in this case, breed) that they think is common and compare it against the subject. This doesn't account for the thousands upon thousands of years of genetic drift and free reproductive travel between populations.
2) Male Ligers are sterile.
3) This has been known since 1922 and most species on the planet observe Haldane's rule: "When in the F1 offspring of two different animal races one sex is absent, rare, or sterile, that sex is the heterozygous sex (heterogametic sex)". This means that in species hybrids, males are sterile, rare or non-existent (XY, heterogametic as opposed to XX, homogametic). This means that it is impossible for hybrids to be their own species. Humans freely reproduce with one another, do not follow Haladane's rule and are not separate species.
4) Reproductive isolation is a huge factor in speciation and differentiation and in fact, in evolution. Humans have not been reproductively isolated from each other for enough of a time to be able to be considered separate species.
5) Genetically, we are 99.9% identical to one another. This is not enough to make a new species. Comparatively, chimps, our closest relative, are 96% identical to us.
6) While lions and tigers are separate species, they belong to the same genus. Much like humans and Neanderthals were different species, but were the same genus. Like tigers and lions, humans and Neanderthals could interbreed as well.
7) Please just say you hate niggers and stop trying to couch it in pseudo-academic language.
Race is a form of social control, and if someone tells you to care about race, be they a Nazi or a progressive, they're trying to control you for their own ends.