"the partisan system is a very destructive one"

... and when there can 'officially' be only two parts, either destruction or paralysis will eventually result.

Which is why the Aussie compulsory proportional system is better - even Britain is thinking about it now.... it takes away the static power of the bigots who will always vote, and ONLY for their own side, and makes the pollies try to woo the more open minded 'centrists', who are not bigots.