What is the Meaning of Citizenship?

A lot of people in our world would like to take on a new or additional citizenship, or relinquish an unwanted citizenship. Why is this? Should anyone be allowed to become a citizen of any country they choose, at any time? What is the best way to determine which citizenship is available to whom, and under what eligibility requirements? Is citizenship different than nationality? Buy a drink at the bar at Walters Cafe on Tuesday 27 November and add your voice, your view, to this important and timely topic.