They are making every effort for the promotion of world peace.

I am working with them towards world peace.

He made superhuman efforts to maintain world peace.

He helped the cause of world peace.

He made a speech in connection with world peace.

I disputed with him about world peace for an hour.

Japan plays an important role in promoting world peace.

We are all longing for peace in the world.

There is no one that does not long for world peace.

We must work hard to promote world peace.

We should do our utmost to establish world peace.

Is world peace made possible by friendship?

What do you think we should do to make for world peace?

The summit conference made a contribution to the peace of the world.

The summit conference was held for world peace.

We should make every effort to maintain world peace.

We are anxious for world peace.

We all wish for permanent world peace.

We should be headed for world peace.

We should make every effort to maintain world peace.