Egypt crisis: Does political Islam have a future?
17 August 2013 Last updated at 01:01 BST
At least 60 people lost their lives in Egypt on Friday as protestors loyal to the ousted President Mohammed Morsi clashed with military forces on the streets of Cairo.
The toppling of Mr Morsi - the country's first democratically elected president - raises questions about both democracy and the party itself.
Has the Muslim Brotherhood proved itself unfit to govern effectively and inclusively - and what future if any does political Islam across the Arab world?
Newsnight's Tim Whewell reports.