SimilarityRank
world_history 0.660 28733
in_recent_history 0.658 63781
in_American_history 0.646 33694
humankind 0.636 17983
human_history 0.628 48428
mankind 0.628 8596
on_this_planet 0.616 28482
in_U.S._history 0.615 60655
our_era 0.606 97719
of_mankind 0.605 36915
on_earth 0.600 8508
in_its_history 0.600 46144
of_humankind 0.590 78574
on_our_planet 0.587 78496
in_modern_time 0.585 34275
human_culture 0.579 62520
in_the_last_century 0.575 65606
human_civilization 0.574 84048
for_mankind 0.567 80276
throughout_history 0.561 20274
the_human_race 0.561 23386
in_the_world_today 0.559 24787
of_the_twentieth_century 0.559 38975
in_this_century 0.556 78663
in_our_lifetime 0.554 83095