The document discusses the importance and global influence of the English language. It notes that the teaching of English through textbooks, courses, and other materials is worth hundreds of millions to the economies of the UK and US. The English language requires no infrastructure to produce or maintain and can be used for both intimate and public services everywhere. Any literate person needs to know English to not be deprived. English is an official language in former colonies like Nigeria and recognized in places like Zambia and Singapore where it is the primary language of government.