meaning in context - What does it mean to call something Leviathan in comparison to others?

Wordweb describes Leviathan as:

1. The largest or most massive thing of its kind


2. Monstrous sea creature symbolizing evil in the Old Testament

A recent Economist article (see The drug war hits Central America) has this usage of Leviathan:

Whatever the weaknesses of the Mexican state, it is a Leviathan compared with the likes of Guatemala or Honduras. Large areas of Guatemala—including some of its prisons—are out of the government’s control; and, despite the efforts of its president, the government is infiltrated by the mafia.

It is clear from this text and the rest of the article that Guatemala and Honduras are worse off than Mexico. If that is so, why is the word Leviathan used to refer to Mexico? From the above meaning of Leviathan, should not Mexico be the worst amongst the three? What is the typical usage of this word Leviathan?

Answer

It is a reference to the philosopher Thomas Hobbes' magnum opus, Leviathan. In that work, Hobbes argues for a powerful, far-reaching state -- a leviathan, so to speak -- to curtail what he sees as man's base and destructive instincts without the hand of a strong sovereign to guide him; it was Hobbes who famously called the natural state of Man "solitary, poor, nasty, brutish, and short." Hobbes did name his book after the massive beast in the Bible, but he used the reference to the Beast's massiveness in a metaphorical and positive sense to emphasize the key idea in his theory of the social contract.

In other words, what The Economist is saying is that Mexico is better off than Guatemala and Honduras because their state has capability to protect against the base state of Man. E.g., against the petty thievery, illegitimate violence, and capricious laws that plague poor, underdeveloped countries, the very same things Hobbes abhorred in his book. As you can you see, the excerpt highlights Guatemala's lack of state control over heavy arms and prisons, traditionally one of the fundamental prerogatives of government -- it clearly does not live up to the ideal Hobbes espoused in Leviathan. Mexico, as weak as its government is, is closer.