Hopefully this will make it through this time. Biology is socially constructed, or, at the very least, interpreted through socially constructed frames. Reality, including empirical reality, is only made meaningful within conceptual and symbolic systems created through, and reified by, social interaction and processes.
Humans are at the center of history and science, because history and science are human products.
This sort of doctrine or ideology becomes a barrier to critical theory and analysis. Whereas history and science are human products, humans are products of social relations. To summarize, human beings and what is considered being human is a product of the sociocultural and historical matrix, itself a product of social relations, made meaningful in the intersubjective. These reciprocal relationships have been defined variously as interaction between agent and structure, and structure and process, etc.