"Vy věříte, že světový mír je možný?"

Translation: Do you believe that world peace is possible?

[Taras895680]

Why not:
Do you believe that the world peace is possible?

[BoneheadBass]

"The" should not be there.

[Nina91468]

But why?

[BoneheadBass]

We are speaking about the general concept of "world peace." The article is not needed here, and it is incorrect to use it. Similarly, you would say, for example, "The astronauts are going into space," not "The astronauts are going into THE space."