This is actually a very important principle that science is learning about large systems like evolution and that futurists are learning about anticipating human society: just because a future scenario is plausible doesn't mean we can get there from here.

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I love those who can smile in trouble who can gather strength from distress and grow brave by reflection. 'Tis the business of little minds to shrink but they whose heart is firm and whose conscience approves their conduct will pursue their principles unto death.