We exhibit a mechanism which dynamically adjusts cosmological constant toward
    $0^+$. The adjustment is quantum-mechanical, discharging cosmological constant
    in random discrete steps. It renders de Sitter space unstable, and triggers its
    decay toward Minkowski. Since the instability dynamically stops at $\Lambda =
    0$, the evolution favors the terminal Minkowski space without a need for
    anthropics. The mechanism works for any QFT coupled to gravity.

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