lisp
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Even though the news media portrays a dire world situation, I disagree. In the last few decades the world has become a safer place and fundamental shifts in technology keep driving down the cost of computing resources, networks, and storage that enable greatly increased global productivity. For much of the world globalization is a rising tide that floats most people's boats. The problem is that not everyone benefits from new paradigms for constant lifelong learning, diminishing advantages of organizations who hold to old mega-scale production and business models, and a free flow of information. The book The Power of Pull is a good reference for ideas how to take advantage of the transitions that the world is going through, whether you like them or not!
Mark Watsons opinions on Java, Ruby, Lisp,
An Introduction to Common Lisp Macro
Macros in Lisp provide a very powerful and flexible method of extending Lisp syntax. They are much, much more powerful than #define macros in C: Lisp macros are a full-fledged code-generation system, while C #define macros are simple string substitutions. Although extremely powerful and useful, macros are also significantly harder to design and debug than normal Lisp functions, and are normally considered a topic for the advanced Lisp developer. Lisp functions take Lisp values as input and return Lisp values. They are executed at run-time. Lisp macros take Lisp code as input, and return Lisp code.