Marx saw the birth of his own age–industrial capitalism–in the feudal society; rather, it is the end thereof that made the birth of capitalism possible. He sees the genesis of primitive capitalism when small artisans started to expand “exploitation of wage-labor and corresponding accumulation.” Yet, the feudal economic relationship and guilds prevented this capital from being turned into industrial capital. It is the end of the feudal regime that made this possible. Dixit Marx,

“These fetters vanished with the dissolution of feudal society, with the expropriation and partial eviction of the country population. […] The discovery of gold and silver in America, the extirpation, enslavement and entombment in mines of the aboriginal population, the beginning of the conquest and looting of the east Indies, the turning of Africa into a warren for the commercial hunting of black-skins, signalised the rost dawn of the era of capitalist production.
Capital, Vol. I, Chap. XXXI