I can provide some general insights into how atheists might approach the question of marriage between close relatives.
It's important to clarify that atheists, like any other group, are a diverse community with a wide range of beliefs and perspectives. Atheism itself is simply the absence of belief in gods or deities and does not dictate any specific stance on issues like marriage between close relatives.
Marriage between close relatives, such as siblings, parents, and children, is generally considered taboo and illegal in many societies and legal jurisdictions. The reasons for this vary, but some common concerns include potential genetic risks associated with offspring of close relatives and societal norms that discourage such unions.
Atheists, like people from other religious or non-religious backgrounds, are likely to be influenced by cultural norms, scientific evidence, and ethical considerations when forming their views on this topic. It's essential to understand that atheism, in itself, does not provide a specific moral or ethical framework, as it is solely a position on the existence of deities.
In contemporary societies, marriage laws and social norms generally prohibit unions between close relatives due to the potential health risks and the complexity of interpersonal dynamics that can arise in such relationships. These laws and norms are often based on a combination of secular ethics, scientific understanding, and cultural traditions.
Again, it's essential to recognize that individuals' views on this matter may vary widely, even within the atheist community. Ultimately, attitudes towards marriage with close relatives are shaped by a variety of factors, including cultural, legal, ethical, and personal considerations.