Short answers, pulled from the story.
Alexander Scriabin was born on Christmas Day 1871 in Moscow into a Russian noble family. He grew up surrounded by piano playing from his aunt after his mother died of tuberculosis when he was only one year old.
The harmonic language of Alexander Scriabin shifted dramatically toward dissonance without becoming fully atonal during this period. Tonal unity was almost imperceptibly replaced by harmonic unity as most of his late music became built on acoustic and octatonic scales combined into nine-note structures.
Alexander Scriabin engaged deeply with philosophies from German authors including Schopenhauer Wagner and Nietzsche while showing interest in theosophy and the writings of Helena Blavatsky. Recent scholarship places him within early Russian cosmism originating from Nikolai Fyodorov's ideas about uniting humanity through cosmic evolution.
The project intended to take place in a temple in India located in the foothills of the Himalayas. This multimedia work called Mysterium was meant to last seven days and involve all means of expression including humanity itself.
On the 22nd of November 1969 the work was fully realized using laser technology loaned from Yale University's Physics Department. A performance in New York City that same year projected colors using a novel construction built specifically for the event by Preston S. Miller.