So, he’s complaining here that modern standards of living isn’t killing enough people off. That’s how. He’s worded it differently, but it’s the same thing. "Formerly, natural selection took place largely as a result of differential mortality.
Hizi maendeleo zimesaidia umma lakini zimeongoza kwa digrii kubwa, zimefungua binadamu kutoka mwendo za kiasili na zinachunga uzuri wake.” Hapa analalamika ati njia za leo za kuishi haiui watu kutosha.