...Roberto Grandinetti Purpose Variation, replication and selection processes are acknowledged as key constructs in studies on how industries evolve, but no theoretical and empirical contributions have applied these key constructs to analyzing industries in specific stages of their history...

... to explain how variety is created, he was unable to establish a decisive view of the issue, as he was able to do with regard to selection. Nevertheless, Darwin never stripped the connection between environment and variation of its significance. In contrast, the Modern Synthesis proclaimed the existence...