There's another way the wish fails drastically.

-Everything evil, past, present, and future, disappears
-This causes a relative shift of alignment in everyone left
-Some people get reassigned due to relative alignment to others
-Removes the people who shift to relative evil
-Rinse and repeat ad infinitum until only the party are still alive with maybe a handful of other people in the multiverse

Nice job breaking the multiverse, hero.

all in a days work my friend

Quick note, D&D isn’t about beating your DM, and if you ever try you will fail, you say this and they could just say nah. D&D is a collaborative storytelling game, the objective is to make a great story and that requires players and DMs working with each-other not against!

Although everyone plays differently so, you do you.

I don't use "alignment" in my games when I DM, so the spell would fail in my campaigns. The players might have an alignment on their character sheet, but that's really just for them as a reminder of the kind of character they wanted to play, and I don't hold them to it. 

Morality has a sliding scale, and what one person thinks is evil another thinks is heroic. Sure there's the part of "or similar, if specified by myself", but then what would end up happening is you would basically become the God of Judgement, being forced to look over every case for every being that has ever and will ever exist until you can make up your mind about whether they should be sent to your carbon realm. In the meantime, the other Gods don't much care for your judgement on their followers/creations, and as such would probably attempt to destroy you. Then you would have to decide if Pelor was evil just because they wanted to stop you from arbitrarily destroying their followers (arbitrary to Pelor, but you have your reasons, of course), and you would either be destroyed, have your power stripped from you, or basically keep destroying beings until there was no one to stand against you based on the moral compass of "Whoever stands against me is evil, as my work is Good". 

Could make for a good storyline for the next campaign, as the Gods enlist their followers to attempt to destroy the God of Judgement without drawing its attention.

yeah somebody else mentioned that campaign idea, so im gonna try and role w it perhaps in one that i dm myself

Yeah that sounds cool but it’s metagaming (Fifth edition???)

idrk, im pretty new to all of this

Just to prevent this sort of thing from causing undue chaos in the games, I limit the wording of the wish to 30 words or less (not including "I wish that") and can't include conjunctions or commas in any context. And I always have my players write out their wishes and once submitted, are permanent as-written.

Even with this constraint, my players have come up with some interesting wishes even though I'm a devious DM when it comes to wishes.

Quote from PitViper0717 >>

Just to prevent this sort of thing from causing undue chaos in the games, I limit the wording of the wish to 30 words or less (not including "I wish that") and can't include conjunctions or commas in any context. And I always have my players write out their wishes and once submitted, are permanent as-written.

Even with this constraint, my players have come up with some interesting wishes even though I'm a devious DM when it comes to wishes.

 Wish is an action, I'd make them say it in 6 seconds.  I mean, let them take a breath and get thier mind right first but then 6 seconds...GO!

I could get this exact effect of the same spell at level 1!!!

Not to mention that there is a time paradox where people might disintegrate immediately after being born. Also imagine how unethical it would be, for anyone who will ever have an evil alignment, so if a kid in the future was a meanie and robbed the dollar store and bullied his peers, he would disintegrate before even being born. This of course means that likely only a small population will survive. With this you would need forced marriages to keep conscience species alive which might even be considered evil so technically they would disintegrate as well as soon as you cast the spell. And YOU would disintegrate because mass disintegration is inherently evil, so you better change that alignment, also all the guys in your party that let you go out with it, say bye-bye. This leaves only unaligned creatures alive and the earth a deserted wasteland. (this is of course not even mentioning that you disintegrated evil people in the past which could've been a common ancestor of all of humanity so yeah.)

Rules Rely on Good-Faith Interpretation. The rules assume that everyone reading and interpreting the rules has the interests of the group’s fun at heart and is reading the rules in that light.

Your "loophole" is in the DMG.