Born in Mihăileni, Botoșani County, his parents were deputy prefect Alexandru Păun and his wife Maria (née Cozmiță).
Moving to the national capital Bucharest in 1892, he became a day-laboring telegrapher and joined the circle for social studies, a socialist organization.
His job took him to Brăila and to rural Neamț County, after which he returned to Bucharest as editor of Lumea nouă socialist newspaper.
He worked as a cashier at the Ion Luca Caragiale-owned Bene Bibenti beer hall on Șelari Street.
As a poet, his style anticipated Sămănătorism and Poporanism, and he was highly appreciated in socialist circles.