perhaps because of corrupt leaders who have turned into dictators?
The Persian empire.
France
I am because I've failed but I already did tried my best :))
serbia
Notably, Manchester
Not civilization as a whole, just communism, socialism, Marxism, and the American Democratic party. These have failed everywhere they have been tried.
ME AND YOU AND THE MONKEY TO!
There has never been a socialist revolution in any industrialised nation, but socialism failed in most of the countries it was being tried to be implemented in for many reasons. The major reason is that those countries were so poor and did not offer much materially for the development of socialism. Marx and Engels always said that socialism would have to be developed on the basis of a great material surplus otherwise it would fail and class struggle would almost certainly start up again.
Teddy Roosevelt
Teddy Roosevelt
Both are correct; the tenses are different (present perfect and past perfect).
You cant. They tried, they failed.
they tried, but they failed.
Many people have tried and failed. It is not smart to clean coins.
Hundreds tried but they had all failed...
France started the construction of the Panama Canal but failed.
Panfilio de Narvaez