1. (a) Conceptions of the nature of value are of two main types: they are either objective, or realistic, or else subjective, that is, psychological. The immediately following pages are devoted to the critical consideration of the first of these, the realistic conception of value as “an indefinable quality which attaches to things independently of consciousness.” According to this view, things have value as they have form or colour or volume. A rose, for example, has the qualities of redness, of fragrance, and also of beauty; a book has the qualities of rectangularity, of twelve-ounce weight, and also of truth; a negro has the qualities of erectness, of brownness, and also of moral goodness or badness. Beauty, truth, and moral goodness, grouped together as ‘values,’ or ‘worths,’ or ‘goods,’ are from this point of view as indefinable and ‘absolute’ as the primary and secondary qualities: indeed, they are together known as “tertiary qualities.’ In G. E. Moore's words, a value or “ ‘good’ is a simple notion, just as ‘yellow’ is a simple notion”; and “just as you cannot, by any manner of means, explain to anyone who does not already know it what yellow is, so you cannot explain what good is.”