There are at least two bands named Ethos: 1) A thrash metal band from Logroño, Spain. 2) A progressive rock band from the US: Here is an excellent example of the US Progressive rock scene of the Seventies: having both technique and excellence, imagination & talent. They seemed to be influenced by a variety of styles. Their sound was a little folky at times, poppy at others, even a little jazzy at times, loosely in the shadow of KANSAS, YES, GENESIS, early KING CRIMSON and others, with lots of vocals everywhere.