Out of these: historical national security, economic security, ecological security, physical security, civil liberties, what do you believe is the most critical component in America’s national strategy in the third decade of the 21st century and why?

Out of these: historical national security, economic security, ecological security, physical security, civil liberties, what do you believe is the most critical component in America’s national strategy in the third decade of the 21st century and why?

You need to provide evidence and support for your selection, your analysis of why you made your choice, and how not addressing this aspect will impact the medium-term future of America (i.e. next 20 years).