Final answer:
The statement that stereotypes have become more negative over time is false. While negative stereotypes have historically existed, there has been progress in challenging them, exemplified by the election of President Obama and the changing attitudes towards women and the LGBTQIA community.
Step-by-step explanation:
The assertion that stereotypes have become more negative over time when considering the social roles of women, attitudes towards the LGBTQIA community, the explicit endorsement of stereotypes of people of color, and the inauguration of the first phenotypical-looking black president in the U.S. is false.
If we examine the historical context, we discover that stereotypes have been a longstanding issue that persists in various forms. During the period between 1970 and 2010, there have been both negative and positive shifts in societal attitudes.
Historically, stereotypes have often been negative, especially towards marginalized groups. For instance, racial and ethnic groups have faced harmful generalizations such as being labeled 'lazy'. However, over time, there has been a growing awareness and challenge to such stereotypes.
The election of the first black president, Barack Obama, in 2008 challenged stereotypes about leadership and race. Moreover, progressive movements have influenced perceptions of the LGBTQIA community and women's roles in society, combating negative stereotypes.
It is important to recognize that stereotypes are not static and can evolve. While negative stereotypes continue to exist, there has also been a notable push towards more inclusive and equitable representation in media and politics, suggesting that attitudes can, and do, change over time.