You can't stop progress
These must be the robots that built this factory. I thought they had all been torn apart and scrapped for parts years ago. Oh look! There's one left. It's so cute! But the pipe is right behind his head. Well... you can't stop progress.

the Sign Painter
[You Have To Explode The Head]

“You can't stop progress”, similar to “the last of the Goo Balls” and “we're all in it together”, is a phrase which occurs in several levels in World of Goo.

Its first instance is on the level You Have To Explode The Head. It is later seen in advertisements by World of Goo Corporation, promoting industrial revolution.

The slogan is the basis in the ongoing theme of imperialism in World of Goo.