Earth has a human population of 7.9 billion, with an overall population density of 50 people per km 2 (36 per sq. mile), excluding Antarctica.Nearly 60% of the world's population lives in Asia, with more than 2.7 billion in the countries of China and India combined.
The Congo Basin has been inhabited by humans for more than 50,000 years and it provides food, fresh water and shelter to more than 75 million people. Nearly 150 distinct ethnic groups exist and the region’s Ba’Aka people are among the most well known representatives of an ancient hunter-gatherer lifestyle.
Dec 19, 2011 · Between 1980 and 2000, however, the Catholic share of Brazil’s population fell by 15 percentage points to 74%. 1 Despite the decline, Brazil’s Catholic population of about 134 million remains by far the largest in the world. (Mexico’s Catholic population is a distant second at 96 million.)
The United States has the fourth largest Catholic population in the world, after Brazil, Mexico and the Philippines.  In the colonial era, Spain and Mexico (Mexico, after 1821)  established missions (1769-1833) that had permanent results in New Mexico and California ( Spanish missions in California ).