The violent crackdown on Zimbabwe's opposition continues.

Well-connected businessmen continue to strip the state of resources, despite famine conditions. The same politicians and securocrats maintain their grip.

So what might drive change?

We ask Alex Magaisa, a lawyer who helped draft Zimbabwe's constitution, and worked with the opposition leader Morgan Tsvangirai in the government of national unity in 2012-13. You can find him online @wamagaisa