Different cultures, nationalities and religions see life from unique viewpoints - separate realities.

These differences make the world an interesting place. A wonderful mix of languages, philosophies, music, cuisine and customs that form the beautiful tapestry that is human culture. The differences can also lead to conflicts, which arise when peoples’ attention becomes fixed on the differences that exist, rather than the similarities they share. One viewpoint considering itself superior to another, the second exerting force to avoid being overwhelmed. We don't have to look very far afield to find examples of this.

What consciousness would we need to develop, in order to encompass all realities?

A big one. One that the planet can unite on. We would need to postulate* a viewpoint that contains sufficient time, space, energy and affinity to promote a point of agreement between all people. A viewpoint that links all cultures, religions, ages and genders. A non religious, spiritual viewpoint that finds a common ground.

If enough people base their daily viewpoint on a wide enough consciousness, that awareness will spread positively, influencing all.

* postulate - A postulate is a spiritual intention placed in the spiritual universe.