Manchester United because:
Won Permier League 19 times
Champions legaue 3 times
Fa cup 11 times
League cup 4 times
1 intercontinental cup
1 cup winners cup
1 club world cup
1. ==Barcelona F.C==
2.==Arsenal F.C==
3.==Manchester United==
4.==Real Madrid==
5.==Inter==
6.==Chelsea F.C==
7.==A.C Milan==
Bayern Munich
Liverpool Football Club of course.
Manchester United Football Club
Al-Ahly is the best and most successful Football club in Africa and Egypt.
FC Barcelona
Real Madrid C.F. officially is the best football club of XXth century.
luis suarez
Kirkham Juniors Football Club!
aston villa
Arsenal
Yes they are!!
Deportivo
Saint Patrick's Athletic Football Club.