Collectively there is nothing that you cannot do, but you have been split by various dogmas and beliefs that have seen you separate into many different groups. The continuing wars and confrontations have made enemies amongst people where none previously existed, and deliberately perpetuated by the dark Ones. Perhaps the biggest obstacles to integration have been religious beliefs, because they also have provided the basis for "them and us" for thousands of years. You will find that fear is at the root of most differences, and historically speaking in the end people do not remember how it came about. Because of re-incarnation you have lived through these periods, and somewhere deep down the result of those experiences still live with you...