>>137019441. Lack of education/language school, bad housing with neurotoxins like lead and asbestos (look at Detroit housing maps for example), lack of nourishment (there's some research relating intelligence to Omega 3 and fish food in Japanese populations for example). Over the past century the difference between black and white populations in the US decreased to a degree that cannot be explained with genetics (I believe that's what this RECENT natural selection is about)and instead correlates with life improvements of blacks
2. Where do they say that?
3. Truth doesn't exist in science, anon. Prominent theories are reflected by their general acceptance within the scientific community (which of course only works the way it should as long as the scientists adhere to scientific principles).
4.wut
5. Again, see point 3. Though "most researchers" is likely wrong here, and isn't specified.
Note that OP's pic is about the question "Is there really a SCIENTIFIC CONSENSUS that there is no evidence...", not about the evidence itself. So the points should answer by citing said consensus.