 That underlying structure rests on two main distinctions. The first distinction is a chronological one running between the founding triumvirate, on the one hand, and second and subsequent generations of utopian socialists, on the other. (These later generations including both loyal followers of the founding triumvirate, and independent later figures such as Étienne Cabet (1788–1856)). The second distinction is a substantive one running between the critical part of utopian writings (the portrayal of faults within contemporary capitalist society), on the one hand, and the constructive part of utopian writings (the detailed description of the ideal socialist future), on the other.