This is partly due to the fact that most classical studies of speciation are based on species that have diverged, and therefore, we speculate back in time to infer the causes of speciation.
Hii ni sehemu kutokana na ukweli kwamba masomo zaidi classical ya speciation ni msingi aina ambayo diverged, na kwa hiyo, sisi kubashiri nyuma katika muda wa infer sababu za speciation.