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The insight of polytheism is conducive to far-reaching religious tolerance. Since polytheists believe, on the one hand, in one supreme and completely disinterested power, and on the other hand in many partial and biased powers, there is no difficulty for the devotees of one god to accept the existence and efficacy of other gods. Polytheism is inherently open-minded, and rarely persecutes ‘heretics’ and ‘infidels’.

Sapiens

Yuval Noah Harari

Do you play pool?” Ding walked to the pool table. “I used to play a little in college.” “She and I loved to play. It reminded us of particles colliding in the accelerator.” Ding picked up two balls: one black and one white. He set the black ball next to one of the pockets, and placed the white ball about ten centimeters from the black ball. “Can you pocket the black ball?” “This close? Anyone can do it.” “Try.” Wang picked up the cue, struck the white ball lightly, and drove the black ball into the pocket. “Good. Come, now let’s move the table to a different location.” Ding directed the confused Wang to pick up the heavy table. Together they moved it to another corner of the living room, next to a window. Then Ding scooped out the black ball, set it next to the pocket, and again picked up the white ball and set it down about ten centimeters away. “Think you can do it again?” “Of course.” “Go for it.” Again, Wang easily made the shot. Ding waved his hands. “Let’s move it again.” They lifted the table and set it down in a third corner of the living room. Ding set up the two balls as before. “Go.” “Listen, we—” “Go!” Wang shrugged helplessly. He managed to pocket the black ball a third time. They moved the table two more times: once next to the door of the living room, and finally back to the original location. Ding set up the two balls twice more, and Wang twice more made his shot. By now both were slightly winded. “Good, that’s the conclusion of the experiment. Let’s analyze the results.” Ding lit a cigarette before continuing, “We ran the same experiment five times. Four of the experiments differed in both location and time. Two of the experiments were at the same location but different times. Aren’t you shocked by the results?” He opened his arms exaggeratedly. “Five times! Every colliding experiment yielded the exact same result!” “What are you trying to say?” Wang asked, gasping. “Can you explain this incredible result? Please use the language of physics.” “All right … During these five experiments, the mass of the two balls never changed. In terms of their locations, as long as we’re using the frame of reference of the tabletop, there was also no change. The velocity of the white ball striking the black ball also remained basically the same throughout. Thus, the transfer of momentum between the two balls didn’t change. Therefore, in all five experiments, the result was the black ball being driven into the pocket.” Ding picked up a bottle of brandy and two dirty glasses from the floor. He filled both and handed one to Wang. Wang declined. “Come on, let’s celebrate. We’ve discovered a great principle of nature: The laws of physics are invariant across space and time. All the physical laws of human history, from Archimedes’ principle to string theory, and all the scientific discoveries and intellectual fruits of our species are the by-products of this great law. Compared to us two theoreticians, Einstein and Hawking are mere applied engineers.”

The Three-Body Problem

Cixin Liu and Ken Liu

many parts of the world have already been freed from the worst forms of deprivation. Throughout history, societies have suffered from two kinds of poverty: social poverty, which withholds from some people the opportunities available to others; and biological poverty, which puts the very lives of individuals at risk due to lack of food and shelter. Perhaps social poverty can never be eradicated, but in many countries around the world biological poverty is a thing of the past.

Sapiens

Yuval Noah Harari

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