The Historical Thesaurus of the Oxford English Dictionary defines progress as “advancement to a further or higher stage, or to further or higher stages successively; growth; development, usually to a better state or condition; improvement . . . applied especially to manifestations of social and economic change or reform.” But, what do “higher stage” and “better state” mean? Are those terms purely subjective or can a near-universal understanding of human progress be arrived at? Steven Pinker from Harvard University provides an answer that the creators of this website also subscribe to: