Thomas interestingly finds a reconciliation between Aristotle’s political thought and Augustine’s who both proceeded him. His fundamental motivation was that one can both be a Christian and agree with large parts of Aristotle’s theories, and he is regarded as one of the first ‘Christian Aristotelians’. Despite Sicily, the society in which this text was written, having major religious influence, especially of Christianity, Thomas’ appeal to an atheist philosopher was controversial at the time. Reading this text with this knowledge in mind makes the experience a lot more interesting.
In many ways, the comparison to Aristotle’s theory could have been made because of the striking similarities of Sicily with the Greek polis. Aristotle’s theory, can be briefly summarised as describing human beings to be autonomous beings who strive to lead the good life (be eudaimon - someone who lives a happy, fulfilled life). As we make choices and these choices can, via repetition, turn into habit, politics should be utilised for ensuring human potential is maximised and people are helped to achieve this state of life. Augustine, by stark contrast, argued that though we technically have free will, we are corrupted due to Adam’s seed to always sin. Hence, happiness can only be achieved in the form of salvation which could only be granted by God. Thus, nothing that we do is good because of us but is due to the grace of God. Therefore, Augustine seriously devalued politics and argued that only complete submission to papal authority could truly redeem one from sin.
In De Regine principal, Thomas argues that human action is an actualisation of human potential, based solely on our rationality and is voluntary, not infused by God. This is because God has created laws in nature which, once created, operate independent from him. This argument from autonomy is definitely more in line with Aristotle’s views. Where there is similarity with Augustine comes where Thomas claims that, unlike the ‘chief good’ (summon bonum) for humans to reach being an internally accessible state of eudaimonia (as with Aristotle), Thomas argues that this is external and dependent on God; salvation. Also, internal moral excellence is not enough to reach salvation - an external spiritual aspect is required. He argues that there are two distinct orders to the world. In one, there is the order of nature - also created by God but is self-moving, includes human nature but does not coerce us in any way. We could choose to not comply with nature if we like, although it would be immoral and sinful. On the other, there is the order of grace. This is a higher order than the former but also penetrates it. So theological virtues such as faith, salvation and so on help one to perfect their moral virtues and natural state.
Interestingly, Thomas does not believe that one has to be a Christian to be morally virtuous, whereas Augustine of course did. Thomas argues that our degree of morality is judged based on our compliance with laws of nature, which can be achieved without being a Christian. The state is formed because human nature dictates, due to our reason, that we want to help ourselves and maintain our life. As this is much more difficult, if not impossible, to achieve individually, we form groups and develop moral dispositions which are in everybody’s interests to eventually create and then use to protect a civil society. Therefore the civil order, with a justice system, administration and so on, provides a legal unity and ensures, or should try to ensure a moral excellence. Politics in this society deals with practical matters - the law oversees things such as crime. This is not necessarily related to one securing their salvation or not. The church within society, then, provides for the spiritual excellence. Importantly, it is to be separate from the administrative and legal system because its role is to only fulfil the supernatural needs of people and belongs to the order of grace. Its power is completely separate from the civil order. What makes this fascinating is how we can see the impact that Thomas must have had on the gradual secularisation of Western society.
By nature, the people must have a good leader and ruler to best keep the legal order in tact. This is best provided by a monarch. This person can be elected by the people to ensure that there is still free action, alongside just rule and civil law; hence there is a constitutional monarchy in the system. Since civil order is so important and must not contravene natural law, the people have a right to bring down their ruler if he is not respecting their rights or is not properly maintaining the civil order. Overall, Thomas argues a connection of the divine, natural and civil law.
I recommend this to anyone who has an interest in the history of political thought in the West, especially the preceding major thinkers of Aristotle and St. Augustine, because Thomas presents an interesting harmonisation of both of their arguments.