I would have to say all of the civil rights acts, because there were three, and even, say, the Immigration Act, which I think also is a civil rights act, maybe on a global perspective, that he cared very, very much about it.
A penny here, and a dollar there, placed at interest, goes on accumulating, and in this way the desired result is attained. It requires some training, perhaps, to accomplish this economy, but when once used to it, you will find there is more satisfaction in rational saving than in irrational spending.