People get behind a cause, it seems, because they want to be a part of something bigger than themselves. When we die, we want a legacy of more than just great shoes and a clean underwear drawer. We want to make a difference.

The question, of course, is who is going to make a difference for us. We have yet to see a group with pickets signs that read: "Find purpose," "Outlaw loneliness," "Stop time," "Eliminate regret." But, after the march is over, after the endangered species is safe, after the working conditions have been brought to standard, these are the nagging issues that remain.

Making a difference is to be commended. But activists can only deal with the external evils of life. Who will march for each individual heart?