Did monster black holes or galaxies come first? The James Webb Space Telescope may have a surprise answer 

 Observations of bright galaxies in the early universe could indicate that black holes were driving star formation and galaxy growth just 50 million years after the Big Bang.  

https://cdn.mos.cms.futurecdn.net/ViZsPp5fDNjWdfCSzD7ZZ7.png

https://www.space.com/james-webb-space-telescope-black-holes-galaxies-first