Eeprom: We carnt survive without anxiety or bad nerves' guess we could in nowadays lifestyle,but thousands of years ago if we wernt alert and scared,worried and nervous ,guess we'd be cool and brave untill some big animal we went afraid of come along and calmly ate us ,or a enemy tribe over the hill invaded if we weren't alert and afraid of such things' then theyd overrun you. . most of us nowadays would be enjoy life much more without our ancient tool of survival kicking into play where it is out of place,but anxiety of possible dangers will help keep us alive from some possible dangers.