Race is a social construct because there is no scientific definition of race and is not consistent between cultures or even in the same culture over time.<p>Species however has a scientific definition - &quot;A species is often defined as the largest group of organisms where two individuals are capable of reproducing fertile offspring.&quot; Thus not a social construct, this is a well defined classification. We may reclassify species based on new information or because they evolved, but that doesn&#x27;t mean its a social construct.<p>Ranking them by importance is social, however.