As the author "explains.:"
".......The flip side of heightened threat bias may not be as sharply defined, as Hibbing notes, but a relative freedom from fear clearly allows for a greater willingness to explore, less fear of others and the unknown, heightened curiosity, a propensity to innovate, etc.— all aspects of the Big Five trait of “openness to new experiences,” identified with liberalism, as noted above. It allows for other aspects of liberalism to flourish as well, particularly a greater capacity for complexity of thought and self-reflection that comes with greater cognitive development—development that’s more favored by decreasing fear. As the world becomes a safer place overall with the advance of civilization, these liberal traits, bringing more deliberation and less impulsive action, are less likely to incur dangerous consequences, which means they have less of a social cost, even as their potential benefits rise.
As societies increase their capacity to create a safer, more nurturing world, these liberal traits are more likely to be socially valuable, because a safer, more nurturing world, which reflects these liberal values is one with reduced actual threats, increased remedies, and greater potential rewards from synergies of different exploratory advances. (The world will also become more friendly to other liberal-related traits or tendencies as well, such as tolerance for uncertainty, and increased integrative complexity—the capacity to first differentiate multiple perspectives and/or dimensions and subsequently integrate or synthesize them.............."
More proof that liberals distort history as they see fit. Roosevelt, the Democrat Party, NY Times et al celebrated the Nazi socialists pre-war. Roosevelt personally ordered that a passenger ship containing refugee Jews turn back to Europe where ultimately most of the Jews ended up in the concentration camps. Yes, FDR the Jew lover of all time.