[7] Kočo (Kosta Solev) Racin was born in 1908 in Veles as Konstantin Apostolov Kostov[citation needed], in the Kosovo vilayet of the Ottoman Empire (present-day North Macedonia).

Racin finished just one year in the local high school at the age of thirteen and then worked in his father's pottery workshop.

[8] In 1924 he took part in KPJ, and in a short time, he positioned himself as one of the most promising young members of the Communist Party of Yugoslavia in Macedonia.

In 1926, Racin became a member of the local Committee of KPJ in Veles, and in this period he was writing for the left-wing newspaper Organizovan radnik (Organized worker).

However, in 1932 the process for reuniting the party began, and in the summer of 1933, the Local Committee of KPJ in Macedonia was started, in which Nikola Orovčanec, Živoin Ćurcić and Racin participated.

In November of the same year, LM started to issue the monthly newspaper "Iskra" (Spark), whose editor was Racin.

His time in jail and the association with Moša Pijade, Rodoljub Čolaković and Ognjen Prica instilled in him faith in the importance of writing in his mother tongue (for Racin the Macedonian).

In 1940, allegedly due to his criticism of the KPJ Committee's work in Macedonia or for refusing to take a stand against Miroslav Krleža, Racin was expelled from the party.

After the capitulation of Yugoslavia, for a period, he worked in Sofia, where he lived with his compatriot Kole Nedelkovski, who shared his thinking.

On the night of 13 June 1943, when he was going back from the Partisan printing house on the mountain Lopušnik, Kičevo, he was mortally shot by the printing-house entrance guard.

In the opinion of his contemporaries, communist official Strahil Gigov politically isolated Racin and organized his murder.

[2][12] Starting in 1928, Kočo Racin wrote songs, stories, literary-historical articles, pieces for several magazines, literary critiques, and essays.

American historian Joseph Rothschild described his style as "inspired by traditional folk-lyrics" and his theme as "the hard fate of the poor".

The same year, the Zagreb review Kritika published his first poem, "Hungry Sons" (Serbo-Croatian: Синови глади, Sinovi gladi).

His relations with Malina Popivanova also sparked his interest in socialist feminism, which he described as a struggle for fundamental human rights.

[17][18][19] Per ethnographer Kosta Tsarnushanov, there are reasonable doubts that Racin was purposefully liquidated, while suspected as an opportunist and pro-Bulgarian oriented communist by the Yugoslav partisans on the orders of Svetozar Vukmanović.

Public figures Venko Markovski and his wife Filimena consider him as an author who was part of the Bulgarian literature.