You may have already seen this excellent article in The Observer by Andrew Rawnsley, entitled “Two-tribe politics is over. But the likes of John Prescott can’t see it”, which as well as pretty succinctly showing the major arguments for & against changing our voting system to AV, also frames the debate in the context of the highly tribalistic values of the Labour “old-stagers” & some of their Conservative colleagues at the vanguard of the No2AV campaign.
Rawnsley also rightly highlights the voting public’s steady drift away from these two tribes from their heyday of the 1951 election where 96% of voters either chose Red or Blue, to the 2010 election where over a third of voters didn’t vote for either of them & nearly 35% of those registered vote didn’t vote at all. He states-
The May result was Labour’s second worst at a general election since 1918 while David Cameron moved into Number 10 with a smaller proportion of support from the electorate than any previous Conservative prime minister. This was not a surprise one-off. It was the culmination of a decades-long movement against the two bigger parties.
The alternative vote is not a perfect adjustment to this transformation, but it does at least recognise that, for millions of voters, their first choice is neither Conservative nor Labour. AV also has the merit of tending to reward politicians who try to reach out to as many of their constituents as possible. It better aligns how we vote with how most of us now think about politics. A declining minority of people identify wholly with one party.
You can read the full article here