Claim: Youth culture has had a strong influence throughout the 20th century including major impacts from the flappers and the Mods.
Evidence: Throughout the 20th century, youths had a strong influence on both lifestyle and culture. The flappers and the Mods are two great examples of the impact of youth culture on society. 
The flappers exemplified how youth culture was influential in fashion and lifestyle. Mods also are a great example of a youth culture movement inspiring a popular lifestyle. Throughout the 20th century, youths had a strong influence on both lifestyle and culture.