Quite a good essay at Aeon here about an idea popularised by Marx that has been influential. Here's a part near the start:
...the most peculiar project born from Marx’s notes was released a year after his death. Engels titled it The Origin of the Family, Private Property and the State. I’ll call it The Origin, for short.
The Origin is like Yuval Noah Harari’s blockbuster Sapiens (2014) but written by a 19th-century socialist: a sweeping take on the dawn of property, patriarchy, monogamy and materialism. Like many of its contemporaries, it arranged societies on an evolutionary ladder from savagery to barbarism to civilisation. Although wrong in most ways, The Origin was described by a recent historian as ‘among the more important and politically applicable texts in the Marxist canon’, shaping everything from feminist ideology to the divorce policies of Maoist China.
Of the text’s legacies, the most popular is primitive communism. The idea goes like this. Once upon a time, private property was unknown. Food went to those in need. Everyone was cared for. Then agriculture arose and, with it, ownership over land, labour and wild resources. The organic community splintered under the weight of competition. The story predates Marx and Engels. The patron saint of capitalism, Adam Smith, proposed something similar, as did the 19th-century American anthropologist Lewis Henry Morgan. Even ancient Buddhist texts described a pre-state society free of property. But The Origin is the idea’s most important codification. It argued for primitive communism, circulated it widely, and welded it to Marxist principles.
The essay goes on to talk about evidence from modern anthropology that goes against the idea.