The correct answer is: "Living in communes with shared possessions".
The counterculture movement in the decade of the 1960s started in UK and later in the US too, and promoted values which differed from the ones most widespread in society. They gained strenght through the particpation on the social causes at the moment, the Civil Rights Movement and the protests against the extensive intervention of the US in Vietnam.
It was related to the hippie way of life. It aimed to make a clear distinction with the previous generation: new and more free forms of sexuality, women's rights, challeging traditional models of authority, experimentation with drugs, and interpreting differently the so-called American Dream. While their parents' generation happiness model consisted on having the perfect family and perfect house in the perfect neighbourhood, the counterculture believed hapinness was far from material possessions and was originated by strong feelings such as love and friendship.
Its members tried to initiate a different way of life from the mainstream and together with their despice towards material possesion, and this is how communes arose.