This book is a collection of the two most important parts of John Locke's political philosophy: the Second Treatise of Government and a Letter concerning Toleration (both published in 1689, in The Netherlands).
In Second Treatise of Government, Locke argues from the perspective of a social contract, like Hobbes and Spinoza before him (and Rousseau and Montesquieu after him). In the state of nature, mankind is in a perpetual state of war: everyone looks pursues his or her own needs and the fruits of labour can be stolen by anyone at any moment. It is clear that this doesn't create an incentive to accomplish something, apart from the fact that feeling insecure 24/7 isn't mentally healthy. Therefore, there comes a time when humans collectively agree to give up the rights to harm others and steal possessions from eachother, and transfer these rights to an umpire - the state.
The state, in Locke's view, is a minimalist one: it has to protect the life and liberties of its citizens, both at home and from foreign powers, as well as to protect the property rights of individual citizens. Therefore, there's need for laws and the power to execute and - if need be - to coercively enforce these same laws. Locke sees these two components as functions of the sovereign and he doesn't seperate the powers per se (cf. Montesquieu's division of power). (He does make a distintion between executive, legislative and federative power, but this is conceptual/philosophical, not political).
So far, this is exactly Hobbes's view on sovereignty. But Locke takes another road when he gets to the topic of the degree of power. Hobbes promotes absolutism (i.e. dictatorship) as a garantuee for peace; Locke doesn't view absolute power as legitimate power. Situations change and power corrups, therefore there can be situations in which rulers turn into despots and government turns into tiranny. In situations like these, it is the sovereign power who breaks the social contracts and thereby gives the people back their right of self preservation. It is then legitimate for the people to start a revolution, with only this caveat: it is not the institution of the sovereign that is illegimate, but the person or group of persons that form this sovereign. Revolutions are therefore personal, not political.
It is important to understand that Locke sees the civil society and the state as two different aspects. Citizens form countless associations and compacts, of which the state is only one (be it the highest). In a sense, Locke makes a plea for constitutional democracy, that can be considered as 'the rules of the game' and leaving citizens free to play - in groups or alone - within these boundaries. It is not strange therefore, that the founding fathers of the United States drew inspiration from Locke when writing their Declaration of Independence.
A very important part of Locke's political philosophy regards the rights of property. People have the right to protect their earned property; this individual right is lost in the social contract and thereafter it is the state that should protect individual property in order to keep the peace. This leads inevitably - especially in post-agrarian economies - to the accumulation of wealth in the hands of select individuals. This is a justified critique on Locke's thoughts, since he was active in the Plantation business (therefore slavery). Locke even justifies slavery, under certain conditions (as a post-war consequence and as a - albeit circumscribed - economic necessity).
A second point of critique is that it seems (to me at least) that Locke follows the Greek tradition in democracy, in that he has especially wealthy men in his thoughts when speaking about freedom and property. These two points (slavery and particular rights) are serious moral flaws in his political philosophy. But then again, this was written in 1689; we have to be careful not to moralize historical documents, but when applying these ideas to our own time and place, we should be careful.
The Letter of Toleration is much simpler (at least in its contents): for Locke, there's no place for religious intolerance - or for intolerance as such - in society. The reasons for this are numerous. For one thing, it is impossible to force or threaten people into believing certain ideas. Thought police is impossible, according to Locke (if he's really right in this, is yet to be seen). Therfore, it's unreasonable to try to coerce people into believing your religious creed. Next, it is not only practically impossible, but it is also against Locke's own political philosophy: the church is one of those civil associations that citizens may form, which in the end fall under jurisdiction and power of the state. According to Locke, there's no place for religious authority in a state-run society.
A third reason is philosophical; there are many, mutually exclusive, religious creeds. They cannot all be right, therefore most of them are illusions. There are no valid criteria to determine religious truths, so we cannot be sure that we are right and all of the others are wrong. Therefore, we have to accept that different people believe different things. Locke also mentions a practical benefit of religious tolerance: economic prosperity.
What can we learn from Locke? As mentioned, Locked turned a blind eye to slavery and economic oppression. He also didn't see universal suffrage as important as we do. But apart from these flaws (which have to be seen in the historical context of 17th century England), there is a strong universalism in Locke's philosophy. He was (to my knowledge) the first philosopher who promoted the right of the people to start revolutions against tiranny and despotism. Besides this, he saw property as a way for society to prosper and reach above the level of mere subsistene (granted, a liberal economy has its own flaws, but still). He was also the first thinker to strive openly for religious tolerance - in a time when people had to publish like-minded books posthumously in order to avoid persecution. Constitutions where freedoms of individuals were garantueed; religious tolerance; these are important lessons for us.
To end this review: it is worth noting that Locke makes various philosophical and conceptual distinctions, which in practice would be quite a different topic. For example, he seems to build his system on a universal human being in the state of nature, without considering practical differences between gender, ethnicity, religion, etc. Political philosophy is idealistic, in the sense that it doesn't deal with the nasty, everyday problems of civil life. It is important to remember this, because we seem to live in an age where masses of people are gradually coerced in a state of universal equality. But as Tocqueville would later on exclaim: freedom and equality are opposite ends - full equality means zero freedom. We should learn to accept differences between human beings, at least in places where they are not relevant.
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Second Treatise
- Principle of Freedom
- Principle of Property (derivative)
- Natural state is cooperative, yet not safe.
- Social contract between people.
- Appointing legislative power who draws up the rights and duties of citizens
- Appointing executive power who, besides being part of legislative, enforces law and protects conditions of safety, liberty, and prosperity
- Federative power (foreign policy and war making) rests with executive power
- All people in society, whether civil servant, administrator or citizen (in all the roles - husband, parent, worker, etc.) are entrusted by all others. All roles are trusts!
- Foreign conquest dissolves society; usurpation and tyranny transform Soevereign into a citizen (state of war)
Locke draws the line at personal liberty, including property. This was revolutionary at the time - up to that time most societies viewed people not as individuals but as parts of a collective. Although Locke isn't able to shake off his own biases (e.g. his elitist stance on access to legislative power based on property rights and his acceptance of slavery as natural law following a just war - and his failure to denounce other forms of slavery), yet within his historical he was a very moderate and tolerant man. Some of his hostilities, for example towards Catholics, are very reasonable, given the popery of earlier Kings and the recent persecution of Anglicans and Nonconformists.
His right to life, liberty and property was a ground-breaking idea which a child of the times and a huge influence on the American Constitution and modern day Human Rights.
Letter on Toleration: a plea to end the intolerance towards other religious creeds. He has a sharp eye, for example noticing the repression being the cause of secrets churches, not the secrecy of churches as hostility. Also, his hypothetical example of a group of Christian colonists settling in America, working together with Indians for common survival, until they are numerous enough to start up the religious enforcement of morals and doctrines. Very realistic and honest, given the times.
Locke basically fights against enforced religion, in any form whatsoever. Religion is always subordinate to the worldly power of the State and thus is at best a free association of people. Any form of violence or repression is illegal and illegitimate and should be supressed by the State. Also, a cooperation between church and State is illigetimate and not to be preferred - this feeds into the worldly ambitions of both, at the cost of the people.
Both in rituals are articles of faith does the State determine the boundaries of churches. Within these boundaries anything is permitted as long as churches respect the rights of every citizen. Every citizen is responsible for his own salvation - neither the Ruler/Government nor the Church - and hence should follow his own conscience. In the case your conscience clashes with the law/State, suffer the punishments and stick to your belief.
Tolerance for everyone except catholics, atheists and antinominians. Exclusion based on principles of rights: catholics obey a foreign, hostile power which undermines the stability of the social contract; atheists lack a moral foundation (God) and hence cannot partake in contracts, duties and rights - they also sow the seeds of unbelief and scepticism; antinominians claim they have their own just laws and undermine the State's authority and hence the social contract.
For his time, especially concerning the English Civil War and the Continental Wars of Religion, and the general climate of strife, censure and religious fragmentation, Locke comes across as a very tolerant and moderate man. His own Puritanism shines through, especially the emphasis on your own conscious and your own freedom, liberty and hence responsibility. There was certainly room for improvement, yet his plea for peace, liberty and prosperity has set off a train of ideas which culminated in the American Constitution of 1776 - in which the Founding Fathers drew heavily on Locke's philosophy of right, his moral philosophy and his plea for religious tolerance.
Historically important works, fairly readable for modern day readers, also stand alone (one doesn't need to read his dense and huge Essay concerning Human Understanding). I would wish we Europeans offer our children these historical works in school. Too many young people in the West don't have any idea where our freedoms and rights came from, what conditions are necessary to protect these, and how important it is to actively fight against threats against liberty, safety and prosperity.
In my own experience, most intellectual, left-leaning people are highly authoritarian and even fascistic/totalitarian in their views, while most of the masses don't regard politics, let alone themes like justice, freedom, etc. as important to their lives. This is a fertile breeding ground for all kinds of hostile ideologies. And I am not talking Trump or Brexit here - all people put things who climate change, globalism, personal safety or open borders above the welfare of individuals are proto-fascists in my view. They stand ready to throw the individual under the bus if this serves the collective. These times need a huge dose of John Locke's liberalism.