I think the big bang singularity and the inflationary expansion phase could hold the key to open individualism.
If all the matter and energy of the universe was once contained in a space smaller than an atom, which then rapidly expanded into high-energy fields, those fields and the particles created were in a state of quantum entanglement.
Billions of years later, when higher-level consciousness gets going on planets like the earth in self-organizing replicating systems, instead of seeing it as separate islands of individual consciousness disconnected from each other, all the conscious entities should rather be seen as a single conscious being experiencing the universe in multiple nonlocal spacetime locations, all those locations connected by the previous quantum entanglement of the pre-universe singularity.
Whether the consciousness/awareness belongs to plants, animals or humans, it is all a single field connected at the quantum level by the big bang entanglement, which fluctuates and vibrates in correspondence to when things die and are born, and all the modalities and intensities of consciousness itself.
Individual death is not absolute death because the conscious field itself transcends and outlives any individual finite organism.
When you 'die' you dissolve back into the consciousness field state which is found within the universe and beyond space and time (Bohm's 'implicate order' found below the Planck length), which unfolds and gets filtered continuously at particular spacetime locations in the form of conscious living organisms.
All the trilobites, fish, dinosaurs, birds, apes, human ancestors, lions, zebras, insects, dogs, mice, plants, in sum everything that has ever been alive and had subjective experiences is actually one and the same consciousness having different experiences from different perspectives in spacetime.