Difference Wallace Darwin family background & class middle class, working wealthy elite, income from estate farm collections 10,000 specimens from Amazon; 125,000 from Malay; over 1,000 new species 5,430 specimens species in focus collected widely in nature studied especially domesticated animal breeds field observations focused on groups focused on individuals relationship with native cultures peers who helped him hunt, collect, travel mostly hired as assistants, or as "curiosities"