As society is organic, it would be foolish to question the hierarchy that has always existed. Thomas Hobbes confirmed a conservative belief in a natural ruling class, writing: 'Some men by nature are made worthy to command.' Burke claimed that: 'true natural aristocracy is not a separate interest in the state. It is essential.' For Burke, natural hierarchy helped provide a ruling class 'to possess the virtues of diligence, order, constancy, and regularity' needed to maintain a healthy society. Even neo-liberals like Rand, who are wary of hierarchy and obligations, accept that there needs to be a state to enforce the rule of law. Conservatives also stress that hierarchy places responsibility on the fortunate to nurture society. Benjamin Disraeli built on this concept of noblesse oblige ['the obligations of the nobility') when he shaped one-nation conservatism. For Disraeli, the fortunate had to prevent the creation of two nations who view each other as 'dwellers in different zones, or inhabitants of different planets.' To maintain the precious unity of society, he expected those towards the top of the hierarchy to fund the government's social reforms. In the post-war years, one-nation conservatives embraced the need for the positive freedom that underpins the welfare state. Even Margaret Thatcher, who famously declared 'there is no such thing as society', went on to explain in the same interview that happiness depended on 'how much each of us is prepared to take responsibility for ourselves and...help by our own efforts those who are unfortunate'.