"The scientific approach to ethics, which many here have labelled Eugenics, works well within an Indigenous frameworks."

Eugenics applies only to genetic manipulation and uses science to justify its ends just as many religions (and other) use their specific beliefs to further dubious interests. They are examples of a widespread affliction which convinces people that they understand much more than they really do. It has been raised in this thread when we have asked if we really know what a "good" world is.

Most of the comments here, relating science and eugenics aim to equate the two and provide a basis for the the fallacious argument "eugenics is bad therefore science is bad".

Adolph Hitler's rise to power was helped, and probably even triggered by draconian sanctions against Germany after the 1914-18 war. Sanctions imposed by other Western countries in the belief that such punishment would discourage further wars. Instead they triggered one. Human logic defeated. I suspect that much of the current world terrorism is also based upon the unsound justification of historical exploitation and maltreatment of the Middle East in the era of colonial and later American "manifest destiny" continuing into the present. 

There currently seems a strong justification for the notion that humanity often doesn't know what is in its best interests, whether based on science, philosophy, art, or whatever. The criticism in this thread suggests we can't even agree on if we are improving. We all seem to identify good and bad, each with our own differing opinions and we all attempt to validate those opinions with our own forms of logic. A significant problem seems to be a lack of humility to recognize that the "truth" derived from any intellectual deliberations may be wrong, providing a shaky foundation for further deliberations on truth itself or how to conduct ourselves based on our perceived truths.

If, as Ian suggests, the indigenous world anticipated much of what science has discovered (and I believe they did), there is a strong argument for recognizing, reaching out to and recruiting the diverse populations of the world to supplement our intellectual resources, regardless of our perceptions of their "sophistication".