The united states Temperance Movement?

the temperance movement was very important. i know that woodrow wilson was involved and so was Franklin D. Roosevelt., Neal Dow, and Frances Williard. It was all about how drinking in america was heavy and how they were compaining to stop the drinking. it was during the 1800's (late 19th century and the early 20th century.) but why did it happen. was it because there were a lot of people getting hurt because of the drinking problem? i know things but not a lot it would be great if i knew who played the key roles in stopping it. and who was against it. ( who, what, where, when, why and how. ) please don't just give links... put some stuff you know about it!