Every next genertion is the next letter in the alphabet (A-Z), Start with young-adult Gen A sims. The Alphabet's live secluded from society. They should not have close friends other than their family and their spouse-to-be. Every marrige is arranged (you know who they are going to marry from birth). Letter B Gen should marry someone with a name that starts with B, letter C with letter C and so on. The heir of every #legacy should be the youngest girl or youngest boy if no girls are had.