attend the tale of Torpedo's Zone

"We'll fire you if you tell others how much you're making" The National Labor Relations Act of 1935 specifically protects employees who discuss their own wages with each other (you can't reveal someone else's wages if you were given that information in the course of work, but you can always discuss your own or any that were revealed to you outside of work duties)

"If we can't fire you for [discussing wages/seeking reasonable accommodation/filing a discrimination complaint/etc], we'll just fire you for something else the next day." This is called pretextual termination, and it offers your employer almost no protection; if you are terminated shortly after taking a protected action such as wage discussion, complaints to regulatory agencies, or seeking a reasonable accommodation, you can force the burden onto your employer to prove that the termination wasn't retaliatory.

"Disparaging the company on social media is grounds for termination" Your right to discuss workplace conditions, compensation, and collective action carries over to online spaces, even public ones. If your employer says you aren't allowed to disparage the company online or discuss it at all, their social media policy is illegal. However, they can forbid releasing information that they're obligated to keep confidential such as personnel records, business plans, and customer information, so exercise care.

"If you unionize, we'll just shut this branch down and lay everyone off" Threatening to take action against a group that unionizes is illegal, full stop. If a company were to actually shut down a branch for unionizing, they would be fined very heavily by the NLRB and be opening themselves up to a class-action lawsuit by the former employees.

"We can have any rule we want, it's only illegal if we actually enforce it" Any workplace policy or rule that has a "chilling effect" on employees' willingness to exercise their rights is illegal, even if the employer never follows through on any of their threats.

"If you [protected action], we'll make sure you never work in this industry/city/etc again." Blacklisting of any kind is illegal in half the states in the US, and deliberately sabotaging someone's job search in retaliation for a protected action is illegal everywhere in the US.

"Step out of line and you can kiss your retirement fund/last paycheck goodbye." Your employer can never refuse to give you your paycheck, even if you've been fired. Nor can they keep money that you invested in a retirement savings account, and they can only claw back the money they invested in the retirement account under very specific circumstances.

"One has indeed personally to come under the shadow of war to feel fully its oppression; but as the years go by it seems now often forgotten that to be caught in youth by 1914 was no less hideous an experience than to be involved in 1939 and the following years. By 1918, all but one of my close friends were dead."

So, for example, Pilgrim's Progress is an allegory of Christian salvation. It's sort of a novel? There are characters who do stuff? but also they are very one-dimensional. The main character is a guy named Christian--yes, really!--who is journeying from his hometown ("the city of destruction") to the Celestial City (heaven). There is not much subtlety to it. It is pretty much what it is. There is no slippage, no playing around with the theme, no places where the symbolism is ambiguous. John Bunyan, the author, is hitting you over the head every step of the way with the Meaning That You Are Supposed To Be Getting From The Story.

Not all allegories are that crude or simplistic; the Narnia books are also allegory for Christianity. They have a lot more subtlety to them and a lot more nuance, and there's a lot of stuff in there that isn't allegorical, but on the crucial matters there is still a 1:1 correspondence. Aslan is Jesus. He's not like Jesus, he's not a character that has some similarities to Jesus or takes themes from the stories of Jesus, he is Jesus.

Tolkien is not doing allegory. Tolkien is taking the material of his life--his faith, his experiences in WWI, his linguistic and historical knowledge, his favorite books--and using them as the building blocks of his story. The themes and imagery and symbols draw heavily from all of that, the characters and settings draw heavily from all of that, but they are too complex to be allegorical. There's a lot of symbolism! It's not allegory.

So, for example, let's take the Dead Marshes referenced above. Does the experience of walking through this muddy wasteland with corpses all around that are rotting but still look like people draw from Tolkien's WWI battlefield experience of dead bodies in the trenches? Of course it does! but there are also a lot of differences. These dead are not from the current war, they are from a previous one--they are a reminder of old conflicts, of the ways the systems and powers of the current war have not come out of nowhere, there is history here. There is meaning that is not drawn from the Somme. And they are also drawing from literary references Tolkien was familiar with--primarily William Morris. Modern readers don't get the references because we have generally not read The House of the Wolflings, but that doesn't mean that the references aren't there.