History and Species

Kant and Marx agree that History is converging on a solidification of the human species. According to the former, the motor of that History is Nature, while according to the latter, it is Dialectical Materialiism.  Thus, neither considers that it is the Species itself.  The likely reason for that neglect is that each accepts the traditional premise that the individual member of the species is given as such.  But, that premise is preempted by that of the concept of the Individual as a part of the Species, which entails the re-conceiving of the Individual as the product of a process of Diversification, thereby transforming the concept of History