What happened to the world's population between 1950 to 2000?

Well the most interesting thing that has happened to the population is that is has massively expanded.

We have started to reproduce exponentially! In 1950s, there were only around 2,5 billion people! In the year 2000, there were already 6 billion people! This is probably the most important thing that has happened, as we have witnessed a huge surge in the amount of people who're alive. 

Cherokee  removal, part of the trail of tears, refers to the  forced  relocation between 1836 and 1839 of thecherokee  nation from  their lands ingeorgia, south carolina, north carolina, tennessee, texas, and alabama to the indian territory (present day oklahoma)  in  the thenwestern united states, and the resultant deaths