Engineers, who were the leaders of the Underground Railroad, helped slaves who were running away by providing them with food, shelter, and sometimes jobs. They hid the slaves from people who were trying to catch them and return them to slavery.
The GDP per Capita, in Nigeria, when adjusted by Purchasing Power Parity is equivalent to 32 percent of the world's average.
1 Nigeria's population is equivalent to 2.46% of the total world population. 2  Nigeria ranks number 7 in the list of countries by population. 3  The population density in Nigeria is 193 people per Km2.4  51% of the population is urban (91,834,051 people in 2014). 5  The median age in Nigeria is 17.8 years. Nigeria ranks number 7 in the list of countries by population. 2  The population density in Nigeria is 193 people per Km2. 3  51% of the population is urban (91,834,051 people in 2014).