Being a citizen implies rights and responsibilities, whether you are a citizen of the world, your country, your state, your community, or your family. The rights and responsibilities are different for each "community" you belong to, but no matter which community you belong to as a citizen, you have the right to fully participate in that group, and you have the responsibility to participate fully, to be informed about that group, to care for the other members of that group, and to care for the world in which the group lives.
What does this mean in practical, everyday terms? As a citizen of the world, you should have human rights and a voice in international matters. You have the responsibility to care for the world, so our environment can be preserved or improved for future generations. You have the responsibility to care for and about other citizens of the world and to have an understanding of their cultures, histories, and ideas. As a citizen of your country, you have all the rights of the Constitution of the United States and its Amendments. You have the right and the responsibility to fully participate in our democratic process by being knowledgeable of that process and voting. You also have the responsibility of affording respect to your fellow citizens and their different cultures and ideas. As a citizen of your state, your rights and responsibilities are much like those you have as a citizen of your country. However, your rights emanate from your state's Constitution. As a citizen of a community, your rights and responsibilities are more local and personal. Caring for your environment and others in your community is a more immediate responsibility, for example, by recycling, by picking up litter on your street, or by volunteering at a local food bank. Voting in local elections is a right and a responsibility, too. As a citizen of a family, your rights and responsibilities are the most immediate and personal. You have the responsibility of making a contribution to your family. This need not be a financial contribution, but a contribution of work or attention. You have the right to have contributions from others in the family, too, and a voice in family decision-making.
At the smallest level of citizenship, it is easy to see what the rights and responsibilities are, and as we move out larger circles of community, it becomes more difficult to know what we should do. But the principles are the same, whether we are citizens of a family or citizens of the world. We are obligated to care for the people and environment, whether that be three people or 3 billion people, and whether that be the sidewalk in front of a house or the polar icecaps.