“To find out what another world’s like. To see what a ‘horse’ is!”

“That’s childish,” Kvetur said. “There’s life on some other star systems,” and he waved a hand at the moonwashed sky, “so they say. What of it? We had the luck to be born here!”

“If we’re better than any other human society,” said Tirin, “then we ought to be helping them. But we’re forbidden to.”

“Forbidden? Nonorganic word. Who forbids? You’re externalizing the integrative function itself,” Shevek said, leaning forward and speaking with intensity. “Order is not ‘orders.’ We don’t leave Anarres, because we are Anarres. Being Tirin, you can’t leave Tirin’s skin. You might like to try being somebody else to see what it’s like, but you can’t. But are you kept from it by force? Are we kept here by force? What force—what laws, governments, police? None. Simply our own being, our nature as Odonians. It’s your nature to be Tirin, and my nature to be Shevek, and our common nature to be Odonians, responsible to one another. And that responsibility is our freedom. To avoid it, would be to lose our freedom. Would you really like to live in a society where you had no responsibility and no freedom, no choice, only the false option of obedience to the law, or disobedience followed by punishment? Would you really want to go to live in a prison?”

“Oh, hell, no. Can’t I talk? The trouble with you, Shev, is you don’t say anything till you’ve saved up a whole truckload of damned heavy brick arguments, and then you dump them all out and never look at the bleeding body mangled beneath the heap—”

Shevek sat back, looking vindicated.

But Bedap, a heavy-set, square-faced fellow, chewed on his thumbnail and said, “All the same, Tir’s point remains. It would be good to know that we knew all the truth about Urras.”

“Who do you think is lying to us?” Shevek demanded.

Placid, Bedap met his gaze. “Who, brother? Who but ourselves?”

The sister planet shone down upon them, serene and brilliant, a beautiful example of the improbability of the real.

• • •

The afforestation of the West Temaenian Littoral was one of the great undertakings of the fifteenth decad of the Settlement of Anarres, employing nearly eighteen thousand people over a period of two years.

Though the long beaches of Southeast were fertile, supporting many fishing and farming communities, the arable area was a mere strip along the sea. Inland and westward clear across the vast plains of Southwest the land was uninhabited except for a few isolated mining towns. It was the region called the Dust.

In the previous geological era the Dust had been an immense forest of holums, the ubiquitous, dominant plant genus of Anarres. The current climate was hotter and drier. Millennia of drought had killed the trees and dried the soil to a fine grey dust that now rose up on every wind, forming hills as pure of line and barren as any sand dune. The Anarresti hoped to restore the fertility of that restless earth by replanting the forest. This was, Shevek thought, in accordance with the principle of Causative Reversibility, ignored by the Sequency school of physics currently respectable on Anarres, but still an intimate, tacit element of Odonian thought. He would like to write a paper showing the relationship of Odo’s ideas to the ideas of temporal physics, and particularly the influence of Causative Reversibility on her handling of the problem of ends and means. But at eighteen he didn’t know enough to write such a paper, and he never would know enough if he didn’t get back to physics soon and out of the damned Dust.