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He explained that our democracy is not self-perpetuating but is a “continuing enterprise and conversation” that depends on civic education.

A question for the future: It is a self-protective, self-perpetuating myth that the military nurtures and rewards leadership.

The Rockströms’ real father, Johan, is the Swedish climate scientist who has helped to develop the concept of climate tipping points, when particular large-scale environmental changes are thought to become self-perpetuating and irreversible beyond a certain threshold.

It raises the question of how much the Pelosi mystique in 2024—at yet another apex just when she’d convinced the world she was semi-retired—is based on a sound foundation or self-perpetuating.

"Our goal was to close this gap in our knowledge. For our study, we compiled the available academic literature on those processes that can influence and accelerate the thawing of permafrost. Combining it with our own data analysis, we assessed all current findings on thawing processes in terms of whether and, if so, on which spatial scale -- local, regional, global -- they could lead to self-perpetuating thawing and therefore to a 'tipping' in connection with a given level of warming."