You know, we’re surrounded by eternity on both sides and we’re here for a fleeting instant. And yet, we have ushered in a whole new force in nature, right?
Ideas, ideas are just as real as the neurons they inhabit. They leap from brain to brain. The ideas have retained the properties of organisms. And even though ideas, which have come out of us, are not made of nucleic acid, they have achieved more evolutionary change in the last 100 years than biological evolution and genes did in a billion years.
That’s the whole James Gleick and Richard Dawkins argument from that essay “What is Meme” about the power of ideas.
Eyes with lower pigment (blue or grey eyes) don’t need to absorb as much light as brown or dark eyes before this information reaches the retinal cells. This might provide light-eyed people with some resilience to SAD.