 The gospel-based soul of female performers such as Aretha Franklin had eclipsed the Supremes' pop-based sound, which had by now evolved to include more middle-of-the-road material.In a cultural climate now influenced more than ever by countercultural movements such as the Black Panther Party, the Supremes found themselves attacked for not being "black enough", and lost ground in the black music market.In mid-1968, Motown initiated a number of high-profile collaborations for the Supremes with their old colleagues, the Temptations.