"Disguises come easily to us," Mr. Bennet said, still smiling. "Perhaps you have heard rumors about a new carburetor suppressed by the gasoline companies, or a new food source concealed by the great food suppliers, or a new synthetic hastily destroyed by the cotton-owning interests. That was us. And the inventions ended up here."
"You're trying to impress me," Dennison said.
"Certainly."
"Why did you stop me from patenting my immortality serum?"
"The world is not ready for it yet," said Mr. Bennet.
"It isn't ready for a lot of things," Dennison said. "Why didn't you block the atom bomb?"
"We tried, disguised as mercenary coal and oil interests. But we failed. However, we have succeeded with a surprising number of things."
"But what's the purpose behind it all?"
"Earth's welfare," Mr. Bennet said promptly. "Consider what would happen if the people were given your veritable immortality serum. The problems of birth rate, food production, living space all would be aggravated. Tensions would mount, war would be imminent—"
"So what?" Dennison challenged. "That's how things are right now, without immortality. Besides, there have been cries of doom about every new invention or discovery. Gunpowder, the printing press, nitroglycerin, the atom bomb, they were all supposed to destroy the race. But mankind has learned how to handle them. It had to! You can't turn back the clock, and you can't un-discover something. If it's there, mankind must deal with it!"