- David Cameron called a referendum on Britain's place in the EU; result: not what he expected, followed by his resignation, and the start of the Brexit process.
- Nobody thought Donald Trump stood a chance of getting the Republican nomination to stand for President of the United States; then nobody thought he stood a chance of winning the election.
- President Erdogan of Turkey called a referendum to give himself augmented presidential powers; he won 51% of the vote after some strong-arm tactics and when invalid polling slips were counted as well.
I say 'nobody', but of course we tend to believe what we want to believe. "Surely nobody would be so foolish ...!" We have to take responsibility for our actions, and for acting on sound principles and evidence.