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most significant events in the past 20 years most important events in the past 20 years most important historical events in the last 20 years major world events in the past 20 years major historical events in the past 20 years most impactful events in the past 20 years important historical events in the past 20 years biggest events in the past 20 years key events in the past 20 years biggest historical events in the last 20 years
