She didn't. She oversaw the effort of the UK to protect its colonial possesions at great blood cost to the natives until all those efforts were undone either by the pressure of the US who wanted to control those for itself, or by the support given by the USSR and China to natives in those countries.

And as for democracy...

https://www.theguardian.com/uk/2013/jan/14/secret-papers-royals-veto-bills