Logos in "The Flowering of the Hippies"

In "The Flowering pf the Hippies" Mark Harris appeals to logos through facts and evidence. Harris gives background information about the hippie movement. He said the music of the movement was rock n roll, which came from the folk, the Beatles, American pop, swing, African drums, and jazz. The variety of music influences gives an example of the hippies' goal of togetherness. He brings up a book The Psychedelic Experience by Leary, Metzner, and Alpert which was the hippie manual for the use of LSD. This concrete data deepens Harris' appeal to logos by providing the logic for their use of LSD.  Harris touches on the Haigh-Ashbury district, which was the place hippies lived during this time in San Fransisco. The district was located two miles away from Golden Gate Park. On March 28, 1966, the residents of this district stopped Panhandle of Golden Gate, which was a park, from being bulldozed. All this information appeals to logos because strengthen his argument about the hippie movement. One fact he discussed which was very important was the phrases the hippies used. Some them were "The 19th Century Was A Mistake The 20th Century Is A Disaster" and Thou Shall Not Kill This Means You. Caution: Military Service May Be Hazardous To Your Health". These phrases create a better understanding of his claim about the hippie movement.