Yes, but unlike the peacock's feathers, technology makes our survival easier not harder. This is what makes us weaker over time. Because of technology, natural

Yes, but unlike the peacock's feathers, technology makes our survival easier not harder. This is what makes us weaker over time. Because of technology, natural selection doesn't select for fitness as strongly as it would otherwise - Technology lowers the bar in terms of what genes are required for survival, so natural selection becomes centered around abstract cultural aspects related to mating such as (for example) wealth which doesn't correlate very strongly with fitness (likely inversely correlated in fact). Anything which allows for weak genes to pass down to the next generations is bad for evolution. That's what happened to many species of birds in New Zealand; there were so few natural predators for such long periods of time that many lost their ability to fly. Then when predators were introduced, a lot of these species went extinct very quickly.