baɪ hˈaɪɚ hiː ɐpˈɪɹz tə mˈiːn wʌtˈɛvɚ kəntɹˈɪbjuːts bˈɛɾɚ tə kəntɹˈoʊl ˌoʊvɚ ðɪ ɛnvˈaɪɹənmənt, vˈɪktɚɹi ˌoʊvɚ kəmpˈɛɾɪɾɚz, ænd spɹˈɛd ʌv pˌɑːpjʊlˈeɪʃən.
By higher he appears to mean whatever contributes better to control over the environment, victory over competitors, and spread of population.