Cancer?

What if cancer never hit humanity? The world would be crazy! First of all, the population would probably be around 8 billion versus 6.5 billion. The available space on our planet would most likely be slim to none. We would practically take up every inch of the surface space. I am not going to call this a negative because I don't think having 1.5 billion more people alive, and a similar number of families happier would be a negative at all. We would obviously need to find many more resources and houses, but other than that it would be great. With more people, more inventions could be found, and the world could be a much more advanced place. Out of the approximate 1.5 billion that died, there had to be several geniuses that could possibly have contributed to the science of the world. A possible Albert Einstein or Thomas Edison could be around. I suppose that a Sadam Houssein or an Osama Bin Laden could have died also, so the people probably even out. The effects of a cancer free species would be tremendously impactful. With no cancer the world would be a much happier, more populated place. A lot of money would be saved in research also. Families would be overjoyed at having lost loved ones back and life would be much less worrisome. No cancer would be great!