Outside of Ayn Rand novels, collective action is necessary for the livelihood of free peoples. Old-fashioned civic virtue used to fill the roles that the state usurped (see Albert Jay Nock's "Our Enemy, The State").
I have a soft spot in my heart for Ayn Rand, but her moral system would be a poor foundation for a free people (which I am here using as a euphemism for market anarchy).
"It’s paradoxical, but the less you focus on your own happiness and focus on others’, the happier you’ll be."
John Galt indeed.