What can we do to overcome our negativity as a species?

There are many paths to healing, and this you have seen in detail as you have explored many personally and sought knowledge about many, many, others. This is because there are multiple levels to the ongoing difficulty. There are physical consequences of energetic imbalance, and then emotional consequences, and then spiritual consequences stemming from the flow of emotions and the actions and choices taken by a person in response to their inner negativity or suffering. So with all of these components and levels of expression of the divine energy you represent, there are many points of intervention available to impinge on the flow of energy, to make energetic realignments within the energy fields, and within the defenses, to change the makeup, to relieve symptoms of discord, and to create renewed awakening to higher power and potential. This can be done to some extent through the physical level, but the other realms of mental, emotional, energetic and spiritual are much more robust and fruitful. This is the great learning stage you are in, to look beyond your current physical medicine approach. The manipulation of the body with chemicals and intervention through surgical alteration can be expeditious, but will never be ultimate answers for most kinds of difficulty or suffering; particularly of the mind and emotion, where the greatest level of discord and suffering are experienced. There are higher solutions needed. Ultimately, the answer is returning to the light by being fully in alignment. This requires holding the highest of love vibrations, with full love and acceptance of the self as well as others, no matter what they may have done. This is very difficult for most humans to achieve and is really the source of the problem and its greatest difficulty. You no longer have the wherewithal, in most cases, to return to this state of enlightenment on your own. This is why so much healing is still needed and why healers can be of such tremendous value to assist people in their forward progress, to move towards a closer awareness, and acceptance, and expression of the divine in their experience at all levels, and their interactions with the rest of the world.