While the Magna Carta was an important “foundational document” was it really a key turning point of history? English barons had rights long before 1215; the Tudor Monarchs were more autocratic than John.
For reference, here are some of the (mostly shorter) clauses in a Magna Carta translation (including some clauses omitted in reissues).
JOHN, by the grace of God King of England, Lord of Ireland, Duke of Normandy and Aquitaine, and Count of Anjou, to his archbishops, bishops, abbots, earls, barons, justices, foresters, sheriffs, stewards, servants, and to all his officials and loyal subjects, Greeting.
(6) Heirs may be given in marriage, but not to someone of lower social standing. Before a marriage takes place, it shall be made known to the heir’s next-of-kin.
(8) No widow shall be compelled to marry, so long as she wishes to remain without a husband. But she must give security that she will not marry without royal consent, if she holds her lands of the Crown, or without the consent of whatever other lord she may hold them of.
(9) Neither we nor our officials will seize any land or rent in payment of a debt, so long as the debtor has movable goods sufficient to discharge the debt…
(10) If anyone who has borrowed a sum of money from Jews dies before the debt has been repaid, his heir shall pay no interest on the debt for so long as he remains under age, irrespective of whom he holds his lands. If such a debt falls into the hands of the Crown, it will take nothing except the principal sum specified in the bond.
(12) No ‘scutage’ or ‘aid’ may be levied in our kingdom without its general consent, unless it is for the ransom of our person, to make our eldest son a knight, and (once) to marry our eldest daughter. For these purposes only a reasonable ‘aid’ may be levied. ‘Aids’ from the city of London are to be treated similarly.
(13) The city of London shall enjoy all its ancient liberties and free customs, both by land and by water. We also will and grant that all other cities, boroughs, towns, and ports shall enjoy all their liberties and free customs.
(15) In future we will allow no one to levy an ‘aid’ from his free men, except to ransom his person, to make his eldest son a knight, and (once) to marry his eldest daughter. For these purposes only a reasonable ‘aid’ may be levied.
(17) Ordinary lawsuits shall not follow the royal court around, but shall be held in a fixed place.
(20) For a trivial offence, a free man shall be fined only in proportion to the degree of his offence, and for a serious offence correspondingly, but not so heavily as to deprive him of his livelihood. In the same way, a merchant shall be spared his merchandise, and a villein the implements of his husbandry, if they fall upon the mercy of a royal court. None of these fines shall be imposed except by the assessment on oath of reputable men of the neighbourhood.
(21) Earls and barons shall be fined only by their equals, and in proportion to the gravity of their offence.
(23) No town or person shall be forced to build bridges over rivers except those with an ancient obligation to do so.
(25) Every county, hundred, wapentake, and tithing shall remain at its ancient rent, without increase, except the royal demesne manors.
(27) If a free man dies intestate, his movable goods are to be distributed by his next-of-kin and friends, under the supervision of the Church. The rights of his debtors are to be preserved.
(28) No constable or other royal official shall take corn or other movable goods from any man without immediate payment, unless the seller voluntarily offers postponement of this.
(31) Neither we nor any royal official will take wood for our castle, or for any other purpose, without the consent of the owner.
(32) We will not keep the lands of people convicted of felony in our hand for longer than a year and a day, after which they shall be returned to the lords of the ‘fees’ concerned.
(33) All fish-weirs shall be removed from the Thames, the Medway, and throughout the whole of England, except on the sea coast.
(34) The writ called precipe shall not in future be issued to anyone in respect of any holding of land, if a free man could thereby be deprived of the right of trial in his own lord’s court.
(35) There shall be standard measures of wine, ale, and corn (the London quarter), throughout the kingdom. There shall also be a standard width of dyed cloth, russet, and haberject, namely two ells within the selvedges. Weights are to be standardised similarly.
(36) In future nothing shall be paid or accepted for the issue of a writ of inquisition of life or limbs. It shall be given gratis, and not refused.
(38) In future no official shall place a man on trial upon his own unsupported statement, without producing credible witnesses to the truth of it.
(39) No free man shall be seized or imprisoned, or stripped of his rights or possessions, or outlawed or exiled, or deprived of his standing in any way, nor will we proceed with force against him, or send others to do so, except by the lawful judgment of his equals or by the law of the land.
(40) To no one will we sell, to no one deny or delay right or justice.
(41) All merchants may enter or leave England unharmed and without fear, and may stay or travel within it, by land or water, for purposes of trade, free from all illegal exactions, in accordance with ancient and lawful customs. This, however, does not apply in time of war to merchants from a country that is at war with us. Any such merchants found in our country at the outbreak of war shall be detained without injury to their persons or property, until we or our chief justice have discovered how our own merchants are being treated in the country at war with us. If our own merchants are safe they shall be safe too.
(44) People who live outside the forest need not in future appear before the royal justices of the forest in answer to general summonses, unless they are actually involved in proceedings or are sureties for someone who has been seized for a forest offence.
(45) We will appoint as justices, constables, sheriffs, or other officials, only men that know the law of the realm and are minded to keep it well.
(47) All forests that have been created in our reign shall at once be disafforested. River-banks that have been enclosed in our reign shall be treated similarly.
(48) All evil customs relating to forests and warrens, foresters, warreners, sheriffs and their servants, or river-banks and their wardens, are at once to be investigated in every county by twelve sworn knights of the county, and within forty days of their enquiry the evil customs are to be abolished completely and irrevocably. But we, or our chief justice if we are not in England, are first to be informed.
(51) As soon as peace is restored, we will remove from the kingdom all the foreign knights, bowmen, their attendants, and the mercenaries that have come to it, to its harm, with horses and arms.
(52) To any man whom we have deprived or dispossessed of lands, castles, liberties, or rights, without the lawful judgment of his equals, we will at once restore these. In cases of dispute the matter shall be resolved by the judgment of the twenty-five barons referred to below …
(54) No one shall be arrested or imprisoned on the appeal of a woman for the death of any person except her husband.
(58) We will at once return the son of Llywelyn, all Welsh hostages, and the charters delivered to us as security for the peace.
(60) All these customs and liberties that we have granted shall be observed in our kingdom in so far as concerns our own relations with our subjects. Let all men of our kingdom, whether clergy or laymen, observe them similarly in their relations with their own men.
(61) SINCE WE HAVE GRANTED ALL THESE THINGS for God, for the better ordering of our kingdom, and to allay the discord that has arisen between us and our barons, and since we desire that they shall be enjoyed in their entirety, with lasting strength, for ever, we give and grant to the barons the following security:
The barons shall elect twenty-five of their number to keep, and cause to be observed with all their might, the peace and liberties granted and confirmed to them by this charter…
Given by our hand in the meadow that is called Runnymede, between Windsor and Staines, on the fifteenth day of June in the seventeenth year of our reign (i.e. 1215: the new regnal year began on 28 May).