Never again, until next time, huh?
Interesting how the most powerful countries in the world are expert decision makers when it comes to issues of maintaining their own power, esp the economic power, over the rest of the world, but when it comes to doing something just because it is decent and humane and ethically responsible, they all act like confused, oblivious, indecisive followers waiting for someone else to "go first."
Please, don't let them fool you. If the UN really wanted to help these people, they would. These countries can invade half the Middle East, pay to send people into outerspace, negotiate the ownership of the world's natural resources. It's not that we can't end a genocide. It's that it is not a priority. Life in Europe and America and Russia and China will go on without poor people in Africa. Those who can make you believe absurdities can make you commit atrocities. -Voltaire
First, the most powerful countries in the world are crap at making decisions when in comes to maintaining their own power. Let me point at Imperial Britain and the current US regime, which has massively undermined its power, as obvious examples of this. They're also shit at negotiating the ownership of resources. Generally this involves giving them to people who fund and support people who are trying to destroy the most powerful countries.
Second, the result of their invading the middle east is, among other things, to make clear that we need to ask "what next"? We could, maybe, stop a genocide for a while by invading. What then? Occupy the area for a few decades? Split up the existing state into a few more?
Going into space is easy: that's just a problem of technology and money.
Rwanda might have been doable if we had intervened very, very early on when the government were busy whipping up the people into a frenzy.