Light-colored eyes exist only because agriculture created selection for pale skin

Evidence

Blue and green eyes, then, are a side effect of natural selection favoring genes for lighter skin among cereal-dependent populations living at high latitudes. If cultural evolution hadn’t produced agriculture, and specifically techniques and technologies suitable for higher latitudes, then there would be no blue or green eyes. — Joseph Henrich, The Secret of Our Success, 281

Categorization

• XREF: connects to: Cultural evolution can create selection pressures stronger than natural ones — Joseph Henrich, The Secret of Our Success: How Culture…, 282; Baltic agriculture led to genetic selection for very light skin — Joseph Henrich, The Secret of Our Success: How Culture…, 281