Just consider all of the things that have to be exactly in the right place in order to sustain life on this planet...the distance from the Sun, the distance of the Moon. And who knows if things that are billions of light years away in some manner help to support life on this planet.
If those “odds” intrigue you,
you should first watch the video, then read the book,
“Privileged Planet”.
For example, a distant gamma ray burst can reset the ecosystem and literally slay the dragons that were in the way of the next step forward.