How does paine use the idea of "family" to compare the relationship of america and great britain?

For all men being originally equals, no one by birth could have a right to set up his own family in perpetual preference to all others for ever, and tho' himself might deserve some decent degree of honors of his contemporaries, yet his descendants might be far too unworthy to inherit them.' Basically, descendants have the right to raise their own family as they see fit.