E.V. Ilyenkov is widely considered to be the most important Soviet philosopher in the post-Stalin period. He is known largely for his original conception of the ideal, which he deployed against both idealist and crude materialist forms of reductionism, including official Soviet Diamat. This conception was articulated in its most developed form in ‘Dialectics of the Ideal’ (2009), which was written in the mid-1970s but prevented from publication in its complete form until thirty years after the author’s death. The translation before you provides for the first time the complete, unabridged and unedited text of ‘Dialectics of the Ideal’ in English translation, including the author’s own subsequent comments on the text.