"One can imagine a kind of hormonal arms race or genetic arms race, whether it's to do with height or IQ, conceivably, in the future. So it's limitless, and that's another of the features that sets it apart from medical intervention."

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We could still have continued the arms race, but the arms race was pointless, and it was another reason we decided to start perestroika. It was senseless to continue to accumulate weapons. We had enough weapons to destroy life on Earth 1,000 times, and therefore it was very clear to us that the arms race could spiral out of control. A conflict could have started, as both the Americans and the Soviets realized, not out of a wrong political decision but because of a failure in the command-and-control systems.

— Mikhail Gorbachev