| Similarity | Rank | |
|---|---|---|
| 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 |