Is it the capitalism the best choice?

Yes.

I don't think so. But This is the best system we have ever known untill human beign could find better than this.

Capitalism is the best system that was discovered until now. It is perfectible, that's for sure, but we know no better one. I'm clearly for capitalism.

Yes. Life expectency and child mortaility rates improved massively after 1800 (when capitalism was first implemented on a grand scale in the United States).

Capitalism has a great track record. Where would you rather live, Mao's communist China or Deng's capitalist China?

Taiwan and Hong Kong have had spectacular success with capitalism. Look at communist North Korea vs. capitalist South Korea.