Earth in Year 3000January, 3000. Earth.

Month/time, year. Location. < good formula.

Ist is a difficult to answer to this question to ask.

You must clarify what the question is, this just feels misplaced.

We must see how the world was in the year 1000, and therefore, to think thatfirst reflect on the world in year 1000. In doing so, we may predict that the world in the next one thousand years the world will change a lot toojust as much.

Word order.

I supposse, that it will be unrecognizsable, sucboth social likely and politically.

Unrecognisable = english/british/australian
Unrecognizable = american (i dont know which one you’re emulating).

Do not use “such” as a connective in this way. You could say “such as”, but then you would have to reference the changes, here is the only acceptable way you could have done it:
“I suppose the world will be unrecognisable in many different ways, such as socially and politically.”
Such as = elaborate on what you said in the principle clause by providing examples.
Principle clause: changes of the world. Changes: socially, politically.

Makes sense ?

If human beings can live all this years without annilhilateing themselfves, I believe theat science will be vfurthery advanced and will have answers for questions iresolublesthe insolvable questions of at present.

This sentence doesn’t make a lot of sense, i get what you’re trying to say but the word order makes it sound very unnatural and hard to read. You need to stick to one idea when you’re writing. You go from human survival -> science without linking the two ideas. If you wanted to do this correctly, you should have completely finished the first phrase about humans living and then moved onto science, instead this is one whole sentence.

I think will not exist countries like we know nowadays themcountries, as they are today, will no longer exist.

Socially, the men will have a siystem to resolve conflicts without the need of wars.

Men is a collective; not specific. Therefore, do not use “the men”; use “men”.

I would like to believe that hunger will had been erradicate of ould have ceased, and that wearlth, and wealth would have been distributed between all people.

Grammar

I only hope the world be a little better thatn today.

It is a comparative, use ‘than’ not ‘that’.

It is difficult to answer to this question.

We must see howcould start by examining what the world was like in the year 1000, and therefore, to think that in the next one thousand years the world will change a lot toon projecting, based on that, what changes we might see in the next one thousand years.

Your sentence makes sense, but I have made some suggestions as to how it could be read a bit more naturally.

I supposse, that it will be unrecognizable, such social likeocially and politically.

If human beings can live all thisose years without annilhilateing themselfves, I believe theat science will be very advanced and we will have answers for questions irresoluvables at present.

Good sentence! Just some spelling errors

I think we will not existhave countries, like we knowdo nowadays them.

Socially, the men will have a siystem to resolve conflicts without need of wars.

Only men? You could say "we" instead.

I would like to believe that hunger will hadve been erradicate of earthd by then, and wealth distributed between all people.

I can only hope that the world would be a little better thatn the world we have today.