Why Do We Learn the English Language

I am sure every well-educated person should speak English, because it is the language of communication, business, science and culture.
English is now the most important and widespread language in the world. It is the state language in five countries: Great Britain, Canada, the USA, Australia and New Zealand. In many Asian and African countries people speak English besides their native one. People also speak English in Europe. English is spoken practically all over the world.