Is the USA the best country for Computer Science? 

It's difficult to definitively declare any country as the "best" for Computer Science as the field is global and constantly evolving. However, the USA is certainly one of the leading countries in terms of technological innovation, research and development, and education in Computer Science.

Many of the world's top universities for Computer Science are located in the USA, including Stanford, MIT, Carnegie Mellon, and the University of California-Berkeley. Additionally, many of the world's top tech companies, such as Google, Facebook, Microsoft, and Apple, and a lot of unicorns and start-ups are headquartered in the USA, making it a hub for cutting-edge technology and research.

Furthermore, the USA offers a diverse and dynamic environment for Computer Science professionals, with a large and thriving tech industry, a supportive entrepreneurial culture, and ample job opportunities. However, other countries such as China, India, and Russia have also made significant advancements in the field and offer their own unique strengths and opportunities.

Ultimately, the best country for Computer Science will depend on individual interests, goals, and priorities, as well as the specific subfield or area of Computer Science one is interested in pursuing.