Six degrees of separation between us and everyone else on this planet. The President of the United States, a gondolier in Venice, just fill in the names. I find it A) extremely comforting that we're so close, and B) like Chinese water torture that we're so close because you have to find the right six people to make the right connection...
7.5 Billion (2017) The current world population is 7.5 billion as of March 2017 according to the most recent United Nations estimates elaborated by Worldometers. The term World Population refers to the human population (the total number of humans currently living) of the world.
According to the 2017 revision of the World Population Prospects the total population was 48,653,419 in 2016, compared to only 12,342,000 in 1950. The proportion of children below the age of 15 in 2015 was 24.3%, 68.7% was between 15 and 65 years of age, while 7% was 65 years or older .