Misc: What author said 'accidents will occur in the best regulated families'?

Questions

What band had a hit with itchycoo park?

What band in the late 80's were exposed for not recording their own hits?

What band performed "roll over lay down"?

What band performed the classic single "all right now"?

What band played to 2.5 million people in 37 countries on its 1993 keep the faith tour?