What is the main difference between a capitalist society like the us and socialist society like canada?

I don't think your premise is quite correct.

I live in Canada. We have 2 main stock exchanges, one of which is so speculative that it is difficult to buy the stocks listed on that board in the United States. But we in Canada think that we should have an exchange like that because it gets companies started.

What makes people think that we are socialistic is our health care system. In 1967 our then prime minister, Lester Pearson, made a choice. He wanted to downsize the armed forces and use it only for peace keeping purposes. In his mind, we would never again take the losses we took in WWI. Our population is far too small to sustain the losses we did. That notion (which was written into law) rightly won him the Nobel Peace Prize.

Instead, he wanted to to put money into (particularly) healthcare and somewhat into education.

Most Canadians think that was a good plan. We receive care for Cancer that it is second to none. Ask any family in the states who has a relative suffering from any form of Cancer. See how many didn't take out a second mortgage to help that family member.

You have to understand that we made a choice. It didn't make us socialistic. It made our government concerned for its citizens.

d) a constitutional amendment

sonar maybe? ? i dont know the choices