Well as usual it comes down to the monetary system. We live under a system where the need for profit comes before the needs of the people. The ramifications of a profit based society being the guiding mentality of the world are immense. Because what increases profit? What keeps prices high, what keeps things of value? Scarcity.
And when scarcity, through natural means or manipulated means, is a beneficial condition for industry and making profit, there can never be a world without poverty or war. It's impossible to expect everyone to act decently and ethically when poverty and in turn crime will always exist to shape human behavior because it's byproduct of the need for profit. And with the competition based economy in a profit structured world, corruption is built in, it's the foundation of the entire system. There will always be abuse of power, there will always be the exploitation of the "little people" for the gain of the "elite".
So we need laws that limit our freedoms, freedoms that we really have on loan for now, because of the massive failures and incredible short comings of the very thing we call the "American Dream". It's one big cruel joke.