Are these sentences OK?
(good things for people)

We need much of this in this world.
We need much of such things in this world.
We need more of such things in this world.

Question

Are these sentences OK?
(good things for people)

We need much of this in this world.
We need much of such things in this world.
We need more of such things in this world.

Answer

1and3 are ok, but I'd write

We need a lot of this in the world. 
We need many such things in this world.
We need more of such things in this world