The riots spawned from a bar raid became a literal example of gay men and lesbians fighting back, and a symbolic call to arms for many people. Historian David Carter remarks in his book about the Stonewall riots that the bar itself was a complex business that represented a community center, an opportunity for the Mafia to blackmail its own customers, a home, and a place of "exploitation and degradation". The true legacy of the Stonewall riots, Carter insists, is the "ongoing struggle for lesbian, gay, bisexual, and transgender equality". Historian Nicholas Edsall writes,