How about a "What If - " thread?
This is where you imagine a world in which, for example, a certain person had never existed, or died before any influence upon the world could be achieved.
OR a specific event, had never happened.
EXAMPLE: - What if Adolf Hitler had been killed in the First World War?
Would Germany have become a Communist nation? There were certainly many battles between Reds and right wing parties in the towns and cities, in the Depression years of the 30's.
Over to you ..