I can nearly assure we aren't part of any other bigger organism cuz, BTW we're not at symbiosis with our enviroment... We'r just xploding it and destroying it...
2nd is that actually human kind does not have same pattern of behaviour as prior had.. what means, a virus or bacteria is beneficious or pernicious but always acts in same way over it's "enviroment" and BTW we don't act following any kind of instinc (actually neither the conservation one cuz our xistence is assured) and human acting is unpredictable... I supposse u won't understand me cuz i dun really know how to xplain what i have in mind in ur languaje... but at least... I tried!!!!!!

PS:What was prior to the big bang????? I find impossible to think on the NON-Xsistence of universe...