Discuss how tourism developed after 1950, looking at the main factors that influence this development

Discuss how tourism developed after 1950, looking at the main factors that influence this development.

Discuss why a definition of tourism is needed and reflect on why it was and it is still difficult to agree on a common one. In answering this question discuss also the UNWTO definition and tell how this could (potentially) help us to overcome previous issues.

MANY WORDS !!!!!