Meat 100 years ago was probably meat.
Meat today is the result of a biolgical protien/flesh factory (modern day farm animal). I don't eat it (mostly) because the stuff is poison, and organicly grown is pricey. I've also read parts of Bhagavad-gita (hari-Krishna "Bible" or vedic verse, Hare-Krishna's are Vegitarian).
About twice a month I'll eat a fish taco or a bean burito (the carnicaria by my house uses pork in their beans).
My concience may one day get to me and I won't use blood or bone meal.