You are sadly misguided. Hippie/baby boomer culture didn't change shit, at least for the better. Ultimately, the boomer's have created a culture where the self is valued above all else. The end result of the hippie's ideals has not been peace and love but rather unchecked free markets, the self-serving hypocrisy of evangelical Christianity, AIDS, a divorce rate hovering around 50%, trillions in debt, the socio-economic genocide of gentrification and subsequent rise of exburbs, the current mortgage/economic crisis, increasing disparity between rich and poor coupled with the death of the middle class, cable news, the war on drugs and the surge in the prison population along with the privatization of the justice system and sundry other pleasures of our Reaganist dystopia.
The boomer mindset is a new paganism, with acquisition as its Athena and the concept of the self (a fairly recent, wholly bourgeoise idea propagated by ideologically bankrupt frauds like Freud and Ayn Rand) as its Zeus enthroned in its olympian Manhattan penthouse. If you are want to go out into a field to listen to music, get high and fuck then power to you but to believe that your hedonism serves any purpose beyond self-satisfaction and filling the coffers of a few scummy drug dealers is at best foolish and at worst dangerous. For all intents and purposes, the 'tea parity' movement closer to the spirit of the original Woodstock than any music festival you have attended.
So, to answer your question, yes we can change the world. We can do so by killing the baby boomers, lest they rape social security, price us out of housing, education and healthcare, and sell us to the Chinese. Either that or you can take after me and slam enough dope into your veins to properly anesthsize yourself, as to be blissfully unaware of how utterly fucked you are.