I fully believe that we as humans are on this Earth for no other reason than the conditions were/are right. Matter and energy will keep building upon itself (evolving) until something stops it.....nothing has stopped it on Earth yet and we're the greatest outcome that has been produced. If true, there is nearly a 100% chance that there is another planet(s) in this universe where the conditions are right for the same outcome. May look different every time, but intelligent life nonetheless. There are hundreds of different opinions, what are yours?