Are countries with a two-party system better off than countries that have 3 or more main political parties?

The reason I ask is because I'm from the Dominican Republic and we are experiencing something that could result in a system similar to the Republican and Democratic two-party system of the United States. We have had 3 main parties for a long time. The PRD, PLD and PRSC. The PRD is a center-left social democratic party, the PLD used to be a center-left party that has gravitated towards a center-right platform in the last decade, and the PRSC is a conservative populist party that is losing a lot of support so now many experts say it will be absorbed by the PLD. I think that the PRSC will disintegrate and we'll be left with 2 parties. Countries with 2 main parties...one center-left and the other center-right tend to be the most stable democracies. The U.S. is a good example of that. So do you think that this is a good thing for the Dominican Republic and its development?

Are countries with a two-party system better off than countries that have 3 or more main political parties?
There is no such thing as a true two party system. Minor parties always meld into the larger ones either before or after an election cycle. In reality, there are one party and multi party systems and that is all. In the US we have libitarians, socialists, communists, maoists and Obamamites. In the end they blend.
Reply:We in the United states of America had several parties when I was younger. We had the American Nazi party, The Workers party, The American Communist party, The American Socialist party. They all joined the Democrat party. I guess it is something that just happens like automobile manufactures. I remember when the US had several, now there is only three and soon to be two.
Reply:Countries should do away with partisan politics if they ever want to truly be united!
Reply:No, only we Americans are so backward or so uninformed or maybe just too lazy.. but we think our way is the only way.. we are wrong.